With new cam designs and studs, head gaskets seem to be nonissue. Few on Ob have seen upwards of 20 psi with an intercooled turbo not outside of its limits. The want is there but the need isnt.
These gaskets would be more for high performing engines, very few have a real need for it. I would give my wild ass guess only a few people would bite. How many bit on the hypermax c-channel gasket, 1 in a decade? Money talks. A few hg for idi or spend time and money developing for another platform hmm?
Not sure what the average high horse/torque numbers are here now but last i saw was 220ish hp 450-500 torque which doesnt need fancy headgaskets...
Fuel pump 1k-1.5k, turbo, ic, studs, cam, fab work, thats potentially a few grand and holds together. Machining heads and fancy gasket kits add more cost. Still woukd be awesome to have as an option
There are companies that will custom make gaskets for you for reasonable. You can get the gas rings sortve... It can be done. Got the money?