eBay
This listing is for a W129 Convertible Top Seal.  Retails for about 150.00 at the dealer.  Item is new and has never been used.  Any questions please call 229-888-2060. 

Fits following W129 models:

129.059                 SL280
129.064                 SL320
129.068                 SL500
129.076                 SL600