Hello Sandman! Welcome to TrikeTalk!
There was a shop in Las Vegas that has (or at least used to) Rewaco. Even if they don't sell the trikes any more they may be able to help you out. I believe this is the one:
Rewaco Trikes LLC
7005 Spdway Boulevard Unit 105
Las Vegas, NV 89115 map
Phone: (702) 736-9997