Grumpy if you are still looking for erson cams I may have found something.
I don't know about the Mr-gasket group but erson cams has techline listed as 1-800-641-7920. This was in the latest Circle-Track magazine I have so I would guess they are still in business for racers anyway.
The website they have listed is the same one I gave earlier, which is a shame because that side takes alot of digging to get to the cam section.
Anyway I hope this helps.