Never saw it comercially or heard about it anywhere but if you contact him he can make one for you I'm sure.
Any chance it was ElektroLumens? He's done several 1C models. In fact I think it was whilst he was running his own forum, so the details may not be on CPF.
Here's an example
http://www.cpfmarketplace.com/mp/showthread.php?t=181202
...how cool it would be having a 1C light that was a P60 dropin.