A guy in Lehi, Utah, under the business name of Coyote racing does the best damn job of anyone I've ever met on the kTM 300 suspenders. He uses Moto-Pro valving, and just has years of experience. I can't even stand to ride my 360 after being on his. I'm buying an 03 300 in a week or two, and Jensen (Coyote) will be the first place I visit.
I think you're right about stocks being a bit harsh, from my experience, on the small stuff, though they'll take the bigger hits okay. Anyway, reply and I can give you Coyote's phone number if your interested.