Might I suggest "The CAN" from hcsharp - http://www.teslamotorsclub.com/showthread.php/8399-Short-and-sweet-J-1772-to-Roadster-adapter-lockable And then a J1772 Model S MC from TonyWilliams - http://www.teslamotorsclub.com/showthread.php/16783-Tesla-Model-S-UMC-cut-open-and-modified-to-J1772 This solution is better than the Roadster UMC in that the adapters are less expensive and more readily available.
Ya I ended up buying a roadster to J1772 adaptor so I have freedom to hit any public charger. Now it's time to figure out the best HPC for getting 40+ amps to the car in the garage. Ideas and experience are welcome! Thx -Rik