I would consider shipping them by motor freight, take a little longer than mail but probably cheaper, as you're talking around fifty pounds or more for blanks, and stocks I'd make a box of 1x4 and 1/4 inch plywood and drywall screws, pack them in blister pack or shredded paper. Fred miller can also cut channels for you, and along with Dave Keck can rough out a profile from the lock back, He's an east coaster as well. Last one I sent to Dave on the west cast from Michigan cost almost $90 round trip, not counting the very reasonable charge Dave hit me with. A lot of the Pakmail places will ship motor freight.
Bill