Both of these companies carry them (among numerous other tasty 107 bits). I've purchased from both of them with good results. Not the cheapest solution, but if you get tired of trolling EBay:

http://www.slaccessories.com/CatalogPage.php?Page=21
http://www.************************/ProductPage.aspx?ProductName=Genuine+Mercedes+Windscreen&productid=102789&producttype=20

__________________
-- Aaron

'87 MB 560SL - 45K
'80 MB 450SL - 180K (Sold )
The rest: '83 BMW 533i - 286K, '04 Ford F150 - 7K, '99 Yamaha YZF-R1 - 10K