does anyone still sell auto batteries for the 510/dura? i like the auto batts more than the manuals, and i have had really good luck with the dura blue led ones i got in febuary, they still work like a champ, and i got 2 with a red led that i got with the yeti i got from Rob at altsmoke when he first carried them, one of those died about a week ago and i am worried these are going to die any day and would like to have a source for more