The CG you're talking about started being rolled out for "K" year PAMs, and some late batches of the "J" year. The only place you can get that for now is if you get a gen part (but you gotta pay $500 just for the CG - IF you can source it), although some new models (can't remember which one) that Sead offers over at RG has got the CG lever with the roller ball.
If you just want the lever and want to pay less than $500, get a rep PAM 233. Its CG lever came with the roller.
Trouble is, if you go down that route, NO adjustment can be made by sanding the CG lever tip to properly fit it against the crown.