Customs won't seize it, it's not restricted. I know of a site in Canada that sells them but I can't give the name since they sell guns as well. A google search should yield some results if your google foo is up to par.
As for Evike that is one of the last places I would buy from, like J-man said a search will tell you why. You could always order from AirsoftPark since they have free international shipping.
Durate et vosmet rebus servate secundis.