I got a "service grade" International Harvester Garand from the Civilian Marksmanship Program. CMP takes old GI Garands and replaces as required to make them shooters. The one I got has only two or three parts that are made by IHC (receiver, bolt, and maybe front sight assembly); the rest seem to be old surplus made by Springfield Armory. It also has a new walnut stock with a CMP cartouche. It seems most Garands have had some parts replaced over the service life so "mix master" Garands are pretty much what you find. I also have a "service grade" H&R manufacture Garand from CMP and that one does have mostly original parts.
M1 Garand - Civilian Marksmanship Program
Pics below are after 5 coats of boiled linseed oil.
M1 Garand - Civilian Marksmanship Program
Pics below are after 5 coats of boiled linseed oil.