[Boxtaboy]

Originally Posted by landrovered

My rear window has a small crack on each side where the canvas meets the vinyl and you can hardly see out of it.

I have been looking at new materials to replace it with and Texin® DP7-3007 TPU seems to be the latest and greatest.

I have found one place in California that sells it and I am waiting on a price from them, I will post the info when I recieve it.

http://tpe-u.com/tpu/emea/en/markets/automotive/docId-2399237/Heckscheibe_des_BMW_Z8_Roadster.html

IMHO, as long as it's plastic, you'll always worry about it cracking. If I couldn't easily find an 03 or 04 top, I'd go the alternative and just buy an aftermarket top for $600, consider a self install with the great instructions shown below, and be done with it. No more plastic window cracking worries...

Top replacement DIY:
http://sites.google.com/site/mikefocke2/replacingthetop-adiy

Link for aftermarket glass windowed soft top for $599 (not really true what they say about OEM look (maybe Mustang or S2000 OEM look), but Porsche's glass window has a seal around it, but still:

http://www.autotopsdirect.com/Boxster-Glass-Windows-s/97.htm