Campmoor has the AA, not sure about the AAA. You could call or email CountyComm. They had AAA's at one time. They aren't on their webb site anymore, but would be worth a call incase they had too few to advertise or a couple left in the retail store.I'm kicking myself for only getting 1 when I did.
CountyComm reported on CPF that they have no Arc AAA's to sell. They did a recent inventory, so I'd call that final.
When prompted about making an Arc AAA clone, they demurred. Basically, they say that their government market is mainly focused on AA's for minilights and so wouldn't be interested.
IIRC, they still have the CMG Infinity Ultra in type III hard anodizing, so that's a decent competitor if you can't find an Arc. They also have keychain lights with slide switches in packs of 20, for a dollar per light.
I personally carry the Infinitiy Ultra-- it's big compared to the Arc, but fine for me. It's nice and bright, and in an emergency can be used to anchor small ships. <img src="/images/graemlins/wink.gif" alt="" />