This might be the best way. Lot of casters and reloaders here join together to spread out the high shipping cost of hazardous materials. Splitting tin and shipping cost 3 ways makes it a decent amount cheaper.
I think rotometals price is higher than $11 a pound for tin right now.
Hmmm gift avoids tax/tariff wonder if anyone has an interesting mold like say corn mold or the cactus mold for making cornbread? Add a note saying how the seller "hope these paper weights are a gift that will remind you that you have a friend here in American" Just about any cool looking mold might do the trick to turn the metal into a "gift" also the vat or tariff on "paperweights" would be on lower price than it would be on price of tin itself.