Hi Flemming,
rear window, not rear door windows?:
looks like there is only one type left over, all others ended. # 5
http://www.realoem.com/bmw/showparts...32&hg=51&fg=05
Rear windows are never double glass, only the side windows have the socalled
INSULATION GLASS.
Unless you want the very expensive bullet proof glass from the S=security version, which costs more than your standard E32.