I used a kit from 4into1 when I replaced the rings in my 78 cb750f. I used their lower cylinder, head and valve cover gaskets, as well as the pucks. I was pretty generous with the gasket dressing, but I’ve had no issues with any of their gaskets leaking.
I’m not affiliated with 4into1, but I used a lot of parts from them while building Veronica, and I’ve been quite pleased with the quality.