They are easy enough to get made if you know the thickness you need.
Stuff like that I draw up in CAD and send it to a local shop to have it waterjet or lazer cut. I would offer to, but I literally just went through all my gaskets yesterday and have no bb intake gaskets to measure as well as I am not sure the thickness.
Some body on here should have the thickness.
Just a thought
Thickness of the plate I believe should be .850.
that thickness sticks in my mind as well. however, if i remember it right, 3/4" spacers were used as a starter, then selective gaskets were used on each side of the plates to best center the ports of the manifold to the head ports. when all was said and done, the total thickness [plate plus gaskets] was approximately .850.
i looked in an old MP engine book that talked about adapter plates, but those plates were for B-1 heads only.
as you said, someone here should have the dimensions of those spacers.
