Try want ads, for sale ads, garage sales, estate sales, gun shops, gun shows, pawn shops, egunparts, Shotgun news, on line auction sites.
A shotgun made for Smith and Wesson, sold under the Smith and Wesson name.
Try e-gunparts.com
No
A shotgun.
L.C. Smith and his family produced guns but are not of Smith and Wesson fame. He is, however, the namesake for the L.C. Smith Shotgun.
www.smith-wesson.com
50-250 usd
Try on line auctions, gun shops, gun shows, pawn shops, estate sales, garage sales, sporting goods stores, egunparts, Shotgun News, etc..
Standard Catalog of Smith and Wesson, 3rd, ed., by Supica and Nahas can answer your question.
Yes Smith and Wesson made a hammerless shotgun. I did read at one time they were the first to do so, but they did not sell a lot of them because of the price back in the late 1800's
Recommend you ask a gunsmith for help.
20-100 USD a box