Maybe I just have bad luck, but I'm always looking for #67 rubber bands since that's what I really need for my Kadet, and I've NEVER actually seen them anywhere. Everytime I try to order them from Sig, Tower, etc, they're out of stock. So, I just get by using #64s and pre-stretching them...And to add to armedzagi's suggestion, soda cans are your friend. I have a Mini Telemaster, on which the trailing edge of the wing was being crusehd by the rubber bands--I cut two pieces out of a coke can and folded them over the T.E.--no more crushing!