Well ill be dipped in .... Google
It looks like what I've been looking for is the Thetford ThermaSan. I've found a lot of opinions both ways about it.. More for it then against it, and many people looking to put it on newer rigs. But at the same time, with my great and vast lack of life, actually found a bunch of manuals and brochures and such. (why anyone would keep things these, ill never know. But thank god they do.)
So now to piece together a rig of my own, muah ha ha ha ha. Who knows, maybe it'll wind up being something I can market to todays generation of RVers as an option? But may take some jerry riggin/testing/Government approval first