About five years ago The engine grill was powder coated. It must not have been a good job because when I removed it to paint the engine lid I discovered rust spots inside. After sanding down and repainting the grill I added the gold letters. Ace hardware had a rubber bushing the same ID. but a hair smaller OD. I added a thin coat of black adhesive pushed it on with a small socket, and it worked. The hardest part was in converting the mm spacing into inches. Who would own a metric ruler over 12" long anyway.