Bill,
I have an NOS seat belt re-tractor with motor, cable and latches.
Over the past few weeks I've been digging through the garage.
I don't know which Jaguar they are from, but you may recognize it.
This forum does not let me attach my files and I'm ignorant on the subject.
Send me an email to steve@equiprx.net and I'll send them to you.
Where on the island are you?
I was originally from Brooklyn 1950s, grew up in Franklin Square 1960s and migrated East.
After 1977 I bolted for the left coast.