The guy I got mine from has a red TT still that I was offered as well. I can ask to see if it for sale as well. It requires far less welding than mine but it still needs to be restored.
The RO80 has a rotary engine. It is not that easy to find parts for RO80s on top of that. You can get most parts for the NSU TT/Prinz.
PM me your phone number and I get back to you.
Alex
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