If the stock is not badly damaged from Bubba where it was chopped, and is good everywhere else, it might be easier to splice a replacement piece back on and refit a correct metal butt plate. Replacement butt plates are on ebay all the time for reasonable prices. This would be tons easier than finding another correct stock that isn't damaged or altered in some other way.

If the carbine is wearing a correct rear and front sight and the bore is good, it might be worth seeing if they would take $600 or $650 for it, focusing on the "ruined" stock.

Good luck. We'd love to see pictures if you do pick it up!