234251 is listed as a V grade 12 bore with 30 inch barrels, a capped pistol grip stock and no extras
there is a selection of repro butplates here -
http://www.csmcspecials.com/category...how=100&page=2
they show up on ebay and I would bet a google seach would show many other sources
please post some photos - BTW the frame size is stamped on the bottome of the barrel lug