Re: replacment bottom metal for Winchester Model 70?
In 1974 I bought a Model 70 in 375. I wanted a steel floor plate because I eventually wanted to get it engraved.
I seem to remember (that's questionable) that the African or 458 Version of the Model 70 came with a steel floor plate and I think I ordered one from Winchester.
I'm pretty sure that's where I got mine, but its been a while.