I worked for a gunsmith in Prince George during the last quarter of the 20thC, who had a 12 spindle Solstrom (sp?) Carving machine. He would do a lot of one off stocks for clients, taking their smashed rifle stock, gluing it back together, Bondo up the cracks and holes, fit plugs to both ends and recreate it in fancy walnut, maple, ebony, whatever you wanted. You can do the same: find a stock duplicator and give him your old repaired stock to duplicate.