From my UK thread..
http://www.mbclub.co.uk/forums/showthread.php?t=26860
You should consider the following Manufacturers:
Aresma GmbH and
Eurotop GmbH
http://www.eurotop.de/site_eng/impressum.htm
as both companies use OEM Wopavin flex-glass with correct thickness and sonnerland-dralon or identical weave canvas.
I'm waiting for a little further information from both before I make any more comment.
As mentioned by PM - please do let us know what you purchased and why.
Lea