Ah yes, the ol' lets change the goalposts ploy.
I have an old Lilliput for which I had made a nice 9-pin extension, all installed in the car, then I purchased a new lilli (old one was worse for wear after too many taking aparts and putting back togethers again) and lo and behold it now has 10-pin connectors.
and can I find the bits to make up an extension, let alone an already made lead. NO!
had to bite the bullet and run VGA and USB extensions. Now working all OK.