Brian,
I bought the camshaft for the A7SS (a 67-356) from British Only Austria and back then Mark (the CEO of BOA) also showed me the followers he's selling.
They looked very reasonable to me, manufactured with far higher accuracy than the ones I had bought elsewhere, they seem to be nitrogen hardened considering the colour. He told me the manufacturer was the same for both the cams and the followers, so I think they should be ok (btw, the cam I bought had a hardness of 53 HRC, which is fair enough)
Cheers, Markus