NavyDeerHunter
Which stock do you have? the glass stock or the laminated wood stock?
Another thought there is a gadget we call the "Clyde Slide" It is a mechanical recoil system used by trap shooters, it would extend your stock length by 3-4"
I'll try to find a picture if you might be interested. It is a spring loaded - aluminum assembly that installs partially into the stock and also extends out of the stock...