Thanks,
Had a quick google. No joy on them or Rimmer Bros, ebay, Jaguar land rover classic.
The SNG Barratt looks like a keeper for other stuff though 👍
I may just have to pretty please them with sugar on to just do it and use the old plugs with a bit of ptfe tape and a new crush washer which is what i would do if i could get to it. But then my experience comes from tinkering on K11 Micras and a Ford Probe 😀