There use to be a small gun shop off one of the back streets downtown, called "Mac's".
What a place!! I'm not sure if he is still open, as he was in bad health and late 60's 25 years ago.
He had a bargain bin that I got a new black plastic stock and pump handel.for my beater 870. He said" that package is so old it's yellow, would you give me $5 for the pair?" I'm sure his palm stung for several days as I socked that five in his hand as quick as ightning!