Many of them went to Iran as aid to the Shah. Many were sent as foreign aid to other countries as well. I remember seeing one at the gunshow at the Santa Clara Co. Fairgrounds back in '84-a DCM M1 back when they were $121.00 and "one per lifetime". Well, this thing was a rebuild, but was beautiful with it's zinc park finish, and red tigerstriped birch stock. I told the old man (my father), "I hope I get an IHC when mine is deliverd". Well, after I placed my order, I started to wish for an SA. But then mine is delivered in 1985. I'd come home from the Jr. College where I was attending, and took a short nap. When I woke up, nobody was home, but a long package was standing up next to the door (my mom had signed for it). DANG! I took it out of the box, and lo and behold, an IHC rebuild, and butt-ugly at that. It was rebuilt in '64 at Anniston AL, and the only IHC part was the receiver, everything else being SA-oh, except for the front sight base. It had been well used since then. I slowly rebuilt it with choice IHC parts, and even found a great SA barrel for it with the same dates as what came on my rifle, except it gauges new, and has not been peened on the splines. I purchased a great G.I. birch stock for it (not red in color, not tigerstriped, but nice and unused, with that dry, unused look). I love it. Now, she's tight as a drum. Ironically, the last four of the serial number is my MOS in the USMC. At the time I received it, I was an 0311 in the reserves, and had no idea I'd ever leave the infantry for the armor field. I guess the folks at the DCM knew something I didn't...
Keep looking. Be patient-you'll find one that someone needs to offload because of money issues, then you'll have a great example of a post-war M1 Garand rifle. If you look too hard, you'll never find one. For some reason, it always works that way for me...