I used to work at Microbytes

lol. For a couple years on and off actually. But yeah, they do carry that brand so you could grab one if need be. The only other decent computer parts store in the montreal area (that I know of) is the Frosty's in the Indian reservation (pay no tax!!) but thats over bridge and far away...
Home
Then again... after a quick check of their website I can't seem to find any aftermarket HSF's..... Best to call them and ask I guess then. If not, get the one from microbytes or a different one. Sorry I cant be much more help than that.
PS: Yes, I really did work at MB.