I had seen reference to Rear Lift Adapters necessary to use a two post car lift for raising a Roadster for maintenance, but this is the first time I had seen any details on the adapters. The pair costs $900 from Tesla: Shop Tesla Gear Roadster Other threads here demonstrate the horror stories of people trying to use a 2-post lift on the Roadster's Lotus cousin without adapters.
I posted a similar query a while back here: http://www.teslamotorsclub.com/showthread.php/8433-What-equipment-do-people-recommend-to-change-tires-at-home?p=305028&viewfull=1#post305028