There are very, very few 'original' M1's left. Most of them were arsenal refurbished multiple times, before most of us here were born. In fact, I'd be extremely wary of an 'all matching' M1, with out a fully documented provenance. Its too easy to gather together all Springfield, Win, or IH parts and put them with the right receiver. The right barrels are a little scarcer, but they're out there. As for stocks Military Gunstock Restoration
they can be made to look exactly correct.
You'd be better off getting it redone, if its in real rough shape. Its probably been redone by US and Korean military armorers several
times already anyway.