After too many hours of research
on my part and conversation with Pompanette and extensive detailed photos to them they sold me the wrong gasket material in the amount of around $120 for 12 feet of it.
No one at Pompanette knew which gasket material was required.
Later they said the gasket material specific to my Bomar portlight could be purchased in 1,000 foot lots by them from the manufacturer (Pompanette doesn't make the gasket).
I returned the remaining amount of gasket to Pompanette and will receive a credit of....$62. That's pathetic considering they advised and sold the wrong product.
It's no surprise why many mariners are installing New Found Metals ports!