Tracy Jenkins
Husqvarna
C Class
Whooooa... I leave you guys alone for a minute and poor Cosmo gets dog piled by TR650 fans
Seriously, though. You might search the threads on supportive dealers/dealers with MOSS and see if there are any options nearby. Even if you had to order from parts from Bill's, Eurosport, or wherever, the TR650 is major bang for the Dual Sport buck, and Perrier has stated he plans to support the old bikes for quite some time.
Ride the heck out of the bike and sell it for parts in 3-4 years and make most or all of your money back. If after a few years I sell mine (and I don't plan to) for half what I paid for it, that's $3300. That is pretty cheap and fun riding. Nothing else on the market is even close.
By law in the us they have to caryy parts for ten years.