But they aren't played with brushes, but sticks!

@op, if you have kontakt 3.5+ then wavesfactory have a nice instrument: http://wavesfactory.com/brush-drums.php

Kamikaze
But they aren't played with brushes, but sticks!

Aaaahhh.....I see said the blind man.

Jamstix also has a brush pak.

Thanks for all of the suggestions, everyone! 
I actually DON'T have AD, it didn't come with X3 Studio. I'm working with the SessionDrummer brush kit, which is pretty nice, and I think the biggest thing I need (besides a real drummer, haha) is the sound of actually brushing across the head. I might mix kits with a soundfont or something. I'll be on the lookout for that.
 
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Since I'd rather not start a new thread, I'll do this here... does anyone know of a good, multi-sample trumpet SondFont? I'm orchestrating a big band tune and the SF2's I have are just too powerful/bright and don't have any change in intensity (sample) with a change in MIDI velocity. Any help here?

So far all samples of brushes I found are hits. The classic drag and snap is a hard thing to sample because it is tempo related sort of. The TTS-1 is fine as a hit , same with the brush kit in SD 3. But the few drag across the head sounds I've found sounded more like a jar full of sand being tipped. 
I gave up looking and just recorded a real snare and brush, you don't have to be a drummer to do this, but you do need the snare and brushes. Actually come to think of it, all you need it the brushes and the correct surface to use like a cardboard box. 

davdud101 I'm working with the SessionDrummer brush kit, which is pretty nice, and I think the biggest thing I need (besides a real drummer, haha) is the sound of actually brushing across the head.
 

That's pretty much what the "stirring the pot/soup" term means. The drummer uses one brush to do a circular sweep on the snare and will usually tap a beat with the other brush/hand.
 
There are of course variations on this (like instead of a circle you just drag from the middle of the snare outward or vice versa). Thing is the only drum sampler I know of that does this is Addictive Drums with the Jazz Brushes adpak. Granted I am not familiar with eveything out there so perhaps there are specialty packs for other samplers.
 
The problem is that the "sweeping/stirring" action is very difficult to make work with MIDI and samples. AD uses some weird programming to make it happen (which is why you need the MIDIPak and the sample ADpak... they work in conjunction).
 
That said if all you want is that sweeping sound set to specific simple rhythms (like 4/4 or whatever) you could probably find some looped samples to just drag right into the clips pane in Sonar.
 
Also as Cactus pointed out you can recreate/record that sound very easily (if you have reasonably steady hands and good sense of timing). Good brushes are kind of pricey (like maybe $40 for a semi decent pair) but are cheaper than a new sampler and fancy sample paks that you have to learn how to program, etc.
 
Of course then you need to actually record it which means a decent mic that can handle higher mid/hi freqs well. A snare is also a massive bonus (and being able to mic the top and bottom so you get the brush and the wire rattle which makes for the best brushed sanre sound). But as Cactus also pointed out you can get a believable sound just on a carboard box. Street performers do this all the time and it sounds pretty cool. The size of the box affects the depth of the sound as does the grain of the corrugation (not sure if that's actually a word... lol). You'll probably want brown carboard (scratchier) as opposed to anything glossy but glossy could garner a snappier sound.
 
Meh... good luck. Brushes are fun and pretty easy to play and easy to slide into a mix.

Dupe... WTF? Been gettign mroe dupes lately. Annoying...

BTW... if you do have an actual snare and want to record your brushwork SM57's are a pretty solid choice for micing both the top and bottom. No fuss no muss.

As mentioned earlier Superior Drummer 2 has a whole brush kit but it's a good bit of money. The sample quality and midi loops are excellent.