Rear window blind

[DCS01]

Folk's,

I have a 1999 - W210, E240 and am looking for a rear window blind. I have the rear (door) side roller blinds from Mercedes. But I'm having no luck finding a rear blind, that is wide enough to cover the whole window. What I don't want to do is put two small blinds in the rear window. Any help with finding an after market etc one would be greatly appreciated.

Regards

Dave