I ship most places overseas, Canada as well and USPS is usually cheaper and faster. There's 2 different customs forms, depending on weight and amount of item. I always go with the 2976-A form. It's larger, but that one covers everything they will want to know. Has a plastic sleeve, 2976 also to put it in, just don't close it up until you drop it off, they stamp it and give you a copy.
Good Luck !
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az guy aka: R & L Bowlers Pro
rlbowlerspro@cox.net