Hi Lynn and Richard,
You were both looking at the correct parts. I tried to find a picture of these parts in both workshop manual and Mk1* parts catalogue but there is absolutely nothing in either book.

Then I looked in the later parts catalogue for Mk1* AND MkII*. This uses the same plate as the Mk1* parts catalogue but with the two items I need added! It shows the gear CTL2216 and housing CTL 2510 B2. So Richard, you were right there.

!! Lynn's left picture says it all, they probably fail often...
Lynn or Richard, if nobody has NOS or used good parts for me can I borrow one of each part from either of you to have them made?

I will off course return them after reproducing them.
BTW, Lynn the seal is also shown. Part number C01UC105387
Cheers,
Marc