You could do worse than these three:
Top: Frederick Scott 12 bore SLE proofed for heavy loads, but weighs only 6 1/4 lbs
16 bore Cogswell & Harrison from London, 30" Damascus barrels. 6 lbs
.410 Thomas Turner with 26" barrels, again modern proof for loads I wont use, 15" stock! 4 lbs even.
All have exactly the same proportioms of stock, though the Cog needs a leather- covered pad to bring it up to length.
|Above: Gerry, John, Scott; Magdalena; Scott Locks|
UPDATE:Tom, you don't usually find these on Gunbroker (maybe from GI); you ind them from friends, whether dealers (like Ron Peterson) or no.t You also need a good gunsmith on standby.