Hi Simon,
I have a quick rack fitted to my CSR; I had a look at the steering rack / gaiter as shown in your photo links, and mine is somewhat different.
The rubber gaiter joins the end of the rack (about 1.5" dia) and is cable tied on.
So, significantly different endings, I could take a pic if that would help, but it seems different configuration.
It gave me an excuse to prod around though prior to a sunshine blat today (day off).
Rob