Too bad you don't have a gun available like one I once owned. It was a Churchill box lock XXV 10 gauge with extra full choked barrels, 25" (of course) long.

I bought it from Holland and Holland back in the 70's and it came with a crossover stock for a right handed shooter with a left master eye. H&H restocked it for me, promising not to use for a stock blank "the box the wood came in", and it turned out to be a well fitting, but plain stock, made to my dimensions 1 3/8" X 2" drop and 14 1/2" pull.

I sold it in a moment of weakness and have no idea where it might be now.