Steve,Does this link help.
https://brillman.com/product/7-8mm-cotton-braid-spark-plug-wire/
As did the MK IIs. I have supplied these in the past to a certain builder of MK IIs located in the USA.Yes mate.
I believe that Mk1s engines use the rubber T-bird type separators.
ok those plastic wire isolators look better than the ones I bought and painted, are they something still for sale anywhere?