the double glass, when one is rolling over top the OE is about $500 installed, supposedly done in one of russian satellite republics...
the one at E.A.T. is the one i was talking about, they have both types, the opaque and the solar one...

i guess, there are some US distributors... now I need to find out how much greenbacks is involved in this ordeal...

It seems that the only correct way to it is by removing the glass from the carriers and properly routing the wiring... not sure, if the rear glass needs to be tinted... on the other hand, some E53 did not have the cold package, so the rear windows were not factory tinted... in that case, the stationary glass needs to be tinted too, and the wiring somehow neatly hidden...