Altrom may sell you the parts, if you show up & act like you're someone important :?
They probably won't give you any good deal though.
One of the best places to get parts is from Brian Harrison:
http://www3.ns.sympatico.ca/roseland/P&S.htmGive him the pt# you want, and he'll send it right to your door for a considerable discount off the Altrom listed price. Plus, no PST since he's out of province. This offsets the shipping cost.
I've dealt with him several times now, got parts for myself, my dad, and QuickTD.