Years ago, Hastings sold 32” barrels for Browning A5 shotguns. Hmm. You could look the part with the loooong barrel, and A5s are sort of thick on the ground at the moment. Not a gas gun, but, recoil with 1 Oz loads out of a long action semi auto with that tube would be nonexistent.
Would probably still fit the dirt cheap part of the equation. All our A5s seem to run pretty well, all of them are 60+ years old.

You’d have the only one on the block.

It is the cheap part that is the tough part.

Best,
Ted