sv big twin valve cover gaskets

[zombiescustoms]

I would like to make some rubber valve cover seals mainly the lower most seal, but I need to know the inner and outer dia. of the cork seals, any help would be great!!

[zombiescustoms]

OK got the measurements, made some and they work great, now what is the trick to keeping the valve tube from leaking where it meets the seal retainer???? there is no seal there, and it is metal to metal.