Er, excuse me, but yes, in the R12 'Exchange Plugins' folder there are After Effects plugins for CS3+4, a separate one for CS5, both PC and Mac. What you on about?
Maxon has not released the C4D2AE connection plugin for R12.
The one for R11.5 does not work in R12.
How does one go about writing the AEC file from R12?
V