If it's an older bowl, the Grillmark grates will fit... ACE had them on clearance for $3.75.... I just did a quick search of their site, and I'm no longer seeing them. I don't believe that the Grillmark grate fits the new model 26er (someone correct me if I'm wrong)...
Good luck... I know you've been trying to cobble together a 26er for some time... almost to the finish line!!