Yes I Do. I had an 89 KTM250 MXC and had the hardest time trying to find parts.
First check Ebay. Always, everyday.
Ebay is an ever changing market. Someone out there has the part sitting on a shelf in their garage collecting dust. Eventually they might dust it off and post it on ebay. Good Luck
Also Helmut Clasen in Canada has TONS of OEM parts for vintage bikes. I bought a piston kit and cylinder from him.
He is also a Moto Hero.
http://speedy_c.tripod.com/
Contact him Via email and tell him BIG DAN referred you.
hecla@sympatico.ca
-BIG DAN