Gasket genius: We need you now!

Hi All: How many of us have owned a MOPAR product that DID NOT have a leaky brake master cylinder? Go to any junkyard full of vintage Mopar cars. Pretty much all of them show a great deal of firewall corrosion around the master cylinder, because they all leaked corrosive brake fluid onto the paint. The leaks are almost always from the master cylinder lid gasket. No matter what I do, I cannot stop my lid from leaking. And yes, I've tried all the tricks listed in this forum, short of replacing the master cylinder which I don't want to do because its original to the car. A local and reputable brake shop overhauled my original MC, and it works great but still leaks. We need a genius level designer to create a new gasket. Not rubber. They always leak. It needs to be made of some new material that fills the space between the lid and the MC body. Something that cannot leak. Maybe something thicker. We've solved problems like this before. If you're that genius designer out there, you can really help out the hobby with this decades - old problem. Lets solve this once and forever, and maybe you could make a lot of money doing this. Thanks for reading.
I used some make it yourself gasket material and made it the size of the MC and cut the inside out hollow. It was just thick enough with the rubber gasket the lid comes with to really make the MC lid tight enough not too leak.