Altadude, a number of the guys on TTips wear Kincos, which I can't find in LA. I emailed Kinco but haven't heard back from them.

Look on wintertrekker in the clothing section article on gloves and mitts. Those guys wear wool and leather gloves. Also look at the mitts on the Empire Canvas Works website. They have two heavy duty versions in a traditional mitt.

I saw a pair of ECW mitts for sale on eBay yesterday.