10-15 yrs ago you could pick up Breda and Beretta made and marked parts quite easily. Not so much today. They key thing is that all military Garand parts, whether made by Springfield, WRA, IHC H&R, Breda or Beretta are interchangeable. There are even some Danish and W. German made replacement parts that work well.
Anyone contemplating a Garand build should get the Kuhnhausen Shop Manual as a technical reference.
The pi$$-poor exchange rate isn't helping with buying parts from the US and Canadian sources are drying up.