FWIW, there's plenty of "meat" in all the "other" Ruger #1 & #3 forends to rasp/etc one down to the AH length/profile.
I've done three different ones, myself - including a barrel-banded issue #3 forend - but I had the luxury of a #! AH forend on hand, to hold next to the one I was working on as a model.
Then, of course, you may/may not want to have the altered FE checkered.
And Fred's correct - Ruger will not just ship out an AH forend.
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