HighlyEducatedScholar
Student of Vapor
This has been my VVPS for my UD since early 2012
http://www.amazon.com/Tekpower-HY-1502-Power-Supply-1-5/dp/B003EGYRP6/ref=sr_1_1?ie=UTF8&qid=1413857470&sr=8-1&keywords=tekpower hy1502
Used every day for almost 3 years and still going strong. The cables for it are also sold on the UD site.
http://underdogvapes.com/vape-accessories/electrical-accessories/lab-vvps-cord
Besides the paint job there is really nothing bad I can say about it. Would definitely recommend to anyone looking for a good power supply to power their UD.
i second this suggestion for anyone looking for a VVPS. i've had this same one for almost as long as i've had my UD and it's been working great. although it doesn't see daily use, i've never had any problems whatsoever. i keep it under my desk when i vape and i don't notice any noises or excess heat produced by it. like Gonzo said, the only downside is the crazy paint job but that's easily fixable. friends may laugh at it but after a session with the UD they usually change their focus to fogged up they are