Lots of fellow Canadians on the forum here. Check the Tayda Shipping thread and others like it.
PedalPCB boards ship cheaply.
Parts can be had from Mouser.ca or from Tayda or from NextGenGuitars.ca — there's a few more places, I'll check back with my list when I can.
Nothing beats building your own Rat, except maybe making it your first build!
My Filigree Siberian Hamster wasn't my first pedal, but it was my first Rat!. Modded for better bass ('cause I use it with my Upright) and I also added stock, Turbo and Bass Rat clipping options (the whiskers...), covered it in real amp-rat-fur :
White washer just to annoy
those people.
Enjoy your build!