Hello, from a silent lurker!
I have also had one (actually, I ordered 2!) inners for the Skorp made up by Speedograph.
Need to send them the snapped inner, but they were fine, and quite cheap as I remember. Not the quickest service but acceptable.
I also had an inner speedo cable made up by them for Belfast's supercar. This wasn't perfect, but just about worked. About as well as the original. Which isnt very good.
My point is that they will make stuff to pattern, and maybe useful to know.
Best wishes to all!
Andy