Dealer Net search showed one at a dealer in Wisconsin. It was a lucky break and the last one in the system. If this had not worked out, we would have ordered a Rotax JPS (Chaparral/Scarab/Glasstron) component. It’s a 16” three-bar grate. AA models are the oldest. The newer ones might have the latest epoxy finish which is expected to have the greatest durability. Good luck to you.