Plastic window protection

[elau]

I helped my next door neighbour to install his hard top on his BMW Z3 for the cold weather and I noticed that he used a soft clothe by Bimmer on his plastic window. Do anyone know of a place I can purchase a similar thing for the SL? I think it is a great idea to put a soft material between the plastic windows for protection. I will even use my hard top more if I have something like that to protect my window. Consider the price of the SL is about half as expansive as a Z3 (his is the M version), but the Bimmer comes with little thing like that while the SL owners suffer from foggy rear window.