Steve -
Have you asked Steve Norton at Cape Int'll? He's marketing a lot of the reproduction Ruddspeed parts now.
Interestingly, I have ... talked to Steve Norton ... he isn't making any Ruddspeed valve covers but he did know of one which he's going to check into. On his website, Cape International, he has a picture of one but it's on a customer's car (DP1729) that he built.
I have only seen one Ruddspeed valve cover in person, it was on Mick Nordquist's extensively modified BJ8 (the one pictured in my first post above). The car has since been sold to a gentleman in Canada. I've never seen one at all the Healey gatherings I've gone to. I'm sure there must be some out there, that's why I posted this "survey."
Doug, I like your Ruddspeed tag addition... nice touch.
Ken Rudd was an interest guy. He was a recognized hot shoe in the U.K. car community.
https://www.ruddspeed.com/
Steve