I've bought just single instruments (kicks and snares) from Drumwerks, so creating a Kontakt nki from them is pretty easy with only 20-30 samples to map. It's still a laborious process, but it's all about getting quality drums on the cheap.
Usually, I'm merely replacing the kick and/or snare on a drum track that's otherwise handled by Superior Drummer's stock kit. Sometimes I just want a deeper or boomier kick, a tighter or looser snare.
BTW, Rick, check out the "Zildjian Mega Bell Power Metal 21-inch Ride" from Drumwerks. Don't know how close this is to the "Iso" effect you're looking for, but the bell samples sound pretty good.