This is Roadster specific - Moving to the appropriate forum.

I think you are talking about the "Tonneau Flap", if so, try this thread:
https://www.crossfireforum.org/forum...lap-cable.html
and:
https://www.crossfireforum.org/forum...ver-flaps.html

I don't think part numbers will do you any good - such parts are generally not available anymore.
But there are a lot of "parts cars" out there, and one thread above talks about using items like 'throttle cables'....