I had to locate the thread, or I would have posted this earlier, however the pacman/bean/cresent moon shape found on USMC covers should not always be...
Definitely a euro clone as Rod stated...Those A-Washers are funky looking! I was only able to find one other similar liner and it was ID'd as a liner...
If they are offering M1C's or that is what you are looking for (not really sure as you ask if any are for sale here, however you plan on buying some...
To give you an idea, here's an unmarked M-2 on M1helmetdepot.com. It's attributed to a vet who was in OSS and the 82nd AB.....Asking price is $17K. ...