My gunsmith contacted one of the more common manufacturers of bases---sorry I don't know which---and they made one for me. It took only about a week longer than normal for them to get it in. We did a steel one, and then he welded it to the action. this effectively stiffens the action to be similar to a single shot action. Now, I may have to get a 20MOA intermediate "base" eventually to get out past 1800 yards, but I like what I have. You could try contacting one of the manufacturers and ask if they can make one for you. The price was very close if not the same.