Since supermoto is so small at the moment there is minimal places that stock anything supermoto. pete @ supermoto specialites found this out the hard way trying to cater to a supermoto specific crowd. He can still special order stuff for you supermotospecialties@rogers.com
Do your research as to what you want online and call around to local places. If that doesnt work order online from the states and ship USPS - usually avoids duty on small packages.
Check forum for sale pages and kijiji regularly incase anything you want pops up
I will be making up some generic axle sliders so hit me up if you want a cheap set of those....