Or you could try Making one. Macon gunstocks will provide you with a stock about 70% complete all you have to do is fitt it?
I have a parker 10 and the stock on it was to small and the drop on the comb was far to much for me. the only way I was going to shoot with this gun was to replace the stock. I STILL HAVE THE ORIGANAL STOCK. It took me about 6 weeks to fit and I even put a cast in it. Here is a link to Macon gunstocks
http://macongunstocks.net/index.html All the best from across the pond.