Does anyone know of a company that makes cartidge adapters? I knew of a guy in AK that made them, but lost the info in a move. I'm looking to get one for an ooooold 12 ga. shotgun in 9mm, .45 ACP, etc. They used to make a thin called a .410er, but that was by Savage Arms, I believe, and the 2 are not affiliated. Thanks for any info anyone has.