Leisure Tech in Canada- was the Canadian distributor for TSK, great folks to deal with

Silas Kwok Helicopters in the San Francisco area- your best bet in terms of having what your buddy needs

HHI in Pennsylvania- you're likely to get clones instead of genuine TSK parts from these guys. And if you're REAL lucky, you'll speak with the owner and get talked to rudely... This company's logo should feature the words "Caveat Emptor".

TSK closed its doors many years ago. Its a long, ugly story, and a real shame; they were some very nice model helicopters.