Although it is an expensive option, a wooden stock extension should be considered. Mark Larson in Tacoma Washington is an artist who has perfected the ability to match the grain and figure on the original stock on the extension and to make the job virtually seamless. I have had Mark do a couple of stocks for me and seen a number of others that he has done for others. At the level of skill/artistry that he has reached, the end result looks like an original, unmodified stock from end to end.

Rich