I've never seen a "tame" roller for a Hemi, I have a couple of the "smaller" ones that are available, and they are still around .650 lift and are pretty long on duration. I doubt if there is one available....I don't see the market for one.

You will need the bronze gear if it is a billet cam (most rollers are).

I still use the same old Crane cam button I've used for many years....I just tap it into the front of the camshaft in between the three bolts.