When I bought my CPO Roadster a few months ago, I was promised a UMC. I actually never received it. I took delivery in early 8/2013 and was told there was a "supplier issue" and that they would not be available until late 9/2013. They actually gave me a Roadster HPC instead, so I was totally fine with that. My understanding is that CPO's no longer come with UMC's. I later bought a UMC on eBay and it turned out to be a non-working unit. I wasn't too happy about that, and I've since noticed the Roadster UMC has been sold out on at the Tesla Gear Store. There didn't seem to be too many mobile charging options for new Roadster owners. Well, I ended up doing the Tony Williams Model S UMC to J1772 conversion and it works very well! I know Tony from our LEAF days. He's a big EV advocate. He really knows his stuff, is very thorough, and does great work. Below are a few pics of the conversion in use with the Tesla J1772 adapter. This would be much better with Henry Sharp's can, but I bought the former before I knew about the latter. The converted Model S UMC is capable of up to 40 amps, but I plugged it into my existing NEMA 6-50 that my Blink EVSE uses and dropped it down to 30 amps. Anyway, Tony's conversion is $650 for the Model S UMC + $135 for the 50 amp J1772 adapter + $200 for the service = $985 (+shipping). You still need a J1772 adapter. I think The CAN is $695 (the Tesla J1772 adapter looks sold out) so a total of $1680. It's a little more than $1500 for the Roadster UMC, but since that's sold out and there are a lot more J1772 public charging stations, this is something to consider.