There are two A-grade stocks on gunbroker, that are supposed to be from small frame guns. He gives the width measurement, so you can check to see if it would fit your gun.

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=357712742
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=357712741

Not affiliated with these in any way.