And rather scarce - counting your recent acquisition, I now know of 4 of them - mine is going into our '19 Centerdoor on the next occasion of the engine being removed.
That's a great idea,if you have quick change bands does it offer any advantage? it seems that it would be a potential oil leak.It always amazed me as to all the contraptions invented to "improve" a already great car.
From what I read, they will leak, but modern sealants will take care of that problem. These covers must have been an expensive solution to something that wasn't a problem to most people, which would account for its rarity these days.
