Was at Whittaker Guns in Owensboro, KY today, and they had an SP1 carbine complete with vinyl-acetate coated buttstock. Story is some guy bought it for his wife and after it had 200 rounds fired through it, it was cleaned and then sat in a safe.
Looked nice, and the vinyl-acetate coated stock appeared excellent. I didn't look at the price, but you could contact them at Whittaker Guns
They also have a dozen or more Colt Carbines in different variations. Call and ask for Darrel. He will be in at 0800 Sunday Morning.