I ordered one of the ceramic plated ones and it arrived Saturday. The only complaint I have with it is the key is poorly staked.
A quick smack with a hammer and punch can make the stakes look however you like. The early AR's were not staked at all, some of them did work loose, but many of them never came loose. Some of the "neat freaks" would be in the habit of taking carrier key off to "detail clean" everything. I never pulled one off except to replace it when misalignment of the gass tube wore the tip off center.
I am glad to see some of the parts becoming available again.