i have no idea. when i wanted to buy a swingarm from them, i called everyday at different times, as well as emailing they everyday, and to this day no on has responded.
www.bikebandit.com is good for OEM parts, not just for blasters. It says that they offer aftermarket stuff too, but I've never looked into any aftermarket stuff from them. If you live near a dealership it may not be worth the shipping, but they do have all the diagrams in PDF and you can see the prices so you can know what to expect when you show up at the dealership.
www.chaparral-racing.com has stuff but from what I've found it's almost always the highest price!! Dennis Kirk is usually second highest with rocky mountain being the best price (on the same exact product) ~95% of the time.