Channel Tools has a built in pure delay you can nudge up in increments for one side. Works very well for "Haas Effect" stuff without cloning.
However this can indeed be acheived manually by cloning the track and simply nudging the hi-hat clip in millisecond increments until you get the desired effect. You would of course pan the clones opposite of each other to get the proper effect (usually hard left/right but playing with pan position of both sometimes reveals more desirable sounds).
That is ONE of the things Channel Tools can do on it's own though but I agree... it's a strange tool to get used to and it requires an intimate knowledge of stereo field wackiness which, although I know a bit more about now, still hurts my little pea brain.
Channel Tools also offer that Mid Gain parameter too which relies on the Mid/Side principle (so turning it up turns up the middle of stereo track which has some crazy effect).
The Sonitus Delay used properly can do the pure delay Haas stuff too but I think it's actually harder to set up than Channel Tools because it is SO in depth/complex (and very cool because of that). I need to work with it more but really CT's delay thingie is soooo much easier to just tweak and forget.
I also "learned" something recently that pure delays of under 30ms (I think it is 30ms IIRC) is imperceptible to the human ear (our brains cannot process that fast of a delay). What those settings do is add "width" to the sound which is likely what you want for this application. Anything above 30ms (again I THINK that is the correct number... just going by my foggy memory) it starts becoming a distinct second sound/transient/whatever. As in it starts turning into the doubled effect of "tock. tock" or increasing it more "tock.... tock" and so on.
So width delay stuff needs to be kept at low delay times.
Really all this crap depends on a good understanding of the stereo field which is a rather mind bending subject. Worth looking into though.
You could also just screw around with various things like chorus, flange and phasers which when set lightly can add width as well. To me it sounds like a good excuse to play with/learn about such things.
Cheers.