Tailgate Hinge Gasket/Seal Material?
 

Hi All,
Well, if nothing else a hurrincane is good for helping pinpoint those
water leaks...

My particular leak (87 CRX Si) is around the tailgate/hatchback
hinges. There are gaskets/seals that go between the hinges and the
body but those aren't available anymore. My question is what would be
a good substitute?

I'm thinking either smear some silicone sealer under the hinge plate
or make a new gasket out of some material, but not sure what - perhaps
an old bicycle inner tube? Or is there something else I should be
looking for?

Thanks for any help/thoughts.

Dan