Thomas, I buy the OPTI belts for my Maney drives (Roadster 30mm Race bike 40mm) from a local supplier here in NZ
Order one day, here two days later so you should be able to get them easy enough in Canada.
They come in tube roll lengths, and are cut to size based on what you order.
There are two types in that range, one for static drive purposes, ie electric motors , over head fans etc and a high torque model suited more for our purposes where the power is variable as in on the gas /off the gas if that makes sense.
Quite a difference in the price between the two though.
Regards Mike