If it’s of any use to you to know, the RHD Mark V idle lever housing #47 part C.3209 is the same as RHD XK120, as are all the shaft parts, but the lever #54 is different.
LHD housing is a mirror image of RHD for both models.
Thanks for your answer, it helped 2 people, and saved a fair bit of time
As I regard you as an authority on these vehicles, I hope you dont mind an additional question regarding what parts you would save from wrecking a MKVII that may be useful to an XK owner.
I will make a new topic for it, as others may be able to chip in