I am trying to find a website that sells Silicone RTV for mold making in Canada, like this http://www.tapplastics.com/product/mold_making_materials/mold_making_supplies/tap_silicone_rtv_mold_making_system/61. Sadly most sites I have found seem to be based in USA which makes shipping over $20. Does anyone in know a Canadian site that I can get this from?