I've already got the packaging problem set, with those very envelopes in fact
-- now that I re-read my earlier post, I realize I should have been more clear. For the bags I might reuse the hundreds (literally) of little plastic bags from Mouser that I've been stashing away (at least to start with).
What's really got me stumped is the machinations involved in shipping this stuff internationally. That is, what forms I might need to fill out and the cost delta going from domestic to international.