There is currently on eBay what I believe to be a raw, totally unmachined aluminum casting, complete with Alcoa trademark and casting number still intact, for a High Standard M100 or M101 .22 pistol frame.
Just type "cast aluminum gun" or put this number: 270523779160 in the search engine.
Just type "cast aluminum gun" or put this number: 270523779160 in the search engine.