Gaylord
+1 for going to Gaylord for the replacements! The problem with going to a parts store and just matching a pair up, is that you have no guarantee that they are going to work right for you(They list applications, and not load ratings in the Catalogs, or on the Strut Packages).... Get the wrong ones, and they will either not be able to hold your cover up properly, or even worse they could warp your cover due to being a higher pressure

Worse case senario with contacting Gaylord, would be they still send you down to your local parts store, but they give you a part number that interchanges with their products
