Depends what type of parts you want to stock.
There's the high volume 'bolt on' parts like air filters, exhausts, etc thatt alot of other companies stock. Altought there is a lack of replacment manifolds available for the engine with only the, IMO, over priced TMS one. (reverse engineering anyone?)
On the other hand I think what a few people would be interested on this site would be the lower volume high parts required for high powered engines that are readily available in the USA but not here like:
CNC Perfomance Heads
waisted seam valves
Forged Rods
High comp pistons