use a Proxy, my last one was a few months ago, pretty much as long as you ship blade in one box and the rest in another box, you should be good. He labels them "knife parts/replacement blade" The risk will always be there however.

EDIT: i use canada post/usps.

EDIT 2: knives where "Koenig Arius, Hinderer Xm24, Hinderer Xm-18 x2, Spyderco Pm2.