Maybe a lower end stripped blemished one could be a good option,,,,if you can't find one. New and not beat up, and strength isn't an issue in that area, just saying,,, there not that much now. And possibly could save you head aches on the build sense anything scrapped is going to be pretty ragged, possibly causing you other problems. just saying
Possibly even contact some of the manufactures and maybe they could help out too ,,,, with something that has some other issue than the mag well that will be otherwise scrapped,, never know. Possibly contact Will @ Red Jacket,, he might be a good resource too,,with all his connections. Never know unless you ask???