Re: I broke my cherry!
My Canadian Tire (in Thunder Bay, Ontario) carries all common brands like Champion, Bosch, NGK, etc. You have to check in their small engine/lawnmower section, not the auto section. I have the NGK B6HS myself which was the spark most suggested to me by members of this board. I'm sure 'Crappy' Tire carries it. However, I got my plug from Sick Bike Parts because I was also ordering a few other parts including the dual pull brake lever.
McGyver could fix that with bubble gum.