These old-as-new TVRs are being sold as rolling chassis, the same way you would buy a Superformance or Rossion, and have otherwise been made to comply with U.S. DOT laws. They're available through Carmel Motorsports in Indianapolis, and all you'll need to do after a phone call and a cash transfer is show up with an engine or a trailer.
We don't know where the supply of cars is coming from, however. The "official" TVR isn't building cars; these are coming from a company called Total Vehicle Remanufacturing. TVR, get it? We don't know anything about them, but hey, one call to Carmel can answer all your questions if you decide you're ready for the raw rear-wheel-drive power of what used to be Blackpool's finest. Hat tip to Alexis!