unfortunately, the only T-Zero Drive train with a large run on the market today is Tesla Motor's Roadster (Tesla Roadster) which is a luxury sport car.
they are using it to raise funds to do higher volume more affordable cars. the Model S is the next vehicle in the pipe, this will be a comparable model to BMW 5 series or Audi A6 and will have a similar price point. (around ~60,000USD well equipped) scheduled for production in 2010.
after the Model S, the next car will be a commuter style vehicle (exact body styling hasn't been determined but I'm guessing a coupe) and will cost about ~30,000USD brand new, comparable in price and performance to say, a ford mustang or a BMW 1 series.
all three cars are expected to have about a 200mile range. (the Roadster ranges from 200-250 depending on how you drive it, EPA combined cycle range is 221)
There are several boutique cars available based on this drive train but if you didn't know about them beforehand about as close as you'll get in the short term are the wikipedia pages about it. (starting at the Tzero itself is a good idea)
if you're looking for a full production electric other than a T-zero drive train, wikipedia has a good list here
the eBox (also T-zero drive train) is a good choice if it goes to large scale production (the total kit + xB would cost about 35,000USD.) at small scale production it's closer to 65,000USD and it's probably worth waiting for the Model S.
XI Wiki


