Hi ak,
I am currently not in a stage where I can print parts yet, but we got our parts from
Eckertech in St. Catharines (cheap shipping). They generally sell kits, but they might be able to send you just the specific parts you need.
I've found their parts to be of very good quality. The only issues we had was that some holes were a bit too small for our metal parts. Nothing a little drilling or filing didn't fix.
I imagine someone in Toronto will probably offer to print you some parts, but in any case, Eckertech is an option.
Good luck,
pb