I found the other thread noting the real oem link - it shows the part no. as 51318408529 for the comfort glass, without rain sensor, at around $850 for the BMW OE version. I'll look for the part no. off pictures in that thread, too, which seems to be a replacement glass.

__________________
2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.