You mean something like this?
This is my Hy Hunter by J.P. Sauer & Sohn. Came with alloy grip straps and imitation stag plastic grips. I had a Uberti trigger guard and bought a Hy Hunter backstrap. Backstrap took a little filing to mate to the trigger guard at the butt. I made the walnut grips out of some scrap I had on hand.
These German made single actions don't bring high prices as collectors' pieces, but they are very robust and well made guns, maybe not fitted as closely as the later Ubertis. But they make very good shooters.
I'd say go for it.