In addition to Egge, there is a guy in Utah who sells them. His name is Jerry Woodland. He and Egge both have the same source for the cams which was a foundry in Turkey. They blanked out a few hundred of them several years ago. There is also a company called Kanter, who I believe may have also use the same source.
From what I know, there was a little bit of a miscommunication and the best cam they could grind from the blank was an "E" cam.
When you break in a new cam, you must use new followers. For those, the same two sources are you best bet. Make sure you always use a Zinc additive in the oil, and don't ever think of running synthetic oil. I also would recommend adding a bottle of GM EOS with every oil change.
If you want a performance cam instead, you'll have to make some adjustments to the head in order to maintain your geometry. Performance cams are ground on original factory cams, so the base circle is smaller. There's only one good source for performance cams, unless you want to try one of the other "name brand" cam grinders. I can tell you, though, that their grinds are just mimics of their SBC cam profiles, and they are not well suite to the OHC.
