Murray model sticker worn away. Can someone help me locate model # by engine info?

Hello, I have a Ultra by Murray i purchased it from Home Depot in 1997. I need a new muffler and cannot find the model number to the mower to buy the right muffler. The behind the seat is a sticker, but it is completely worn away. I should have written it down but I figured it was on somewhere else on mower like the engine sticker - it is still strong. Anyway, can someone tell me the model number for my mower from the engine info?



Engine:

Kohler Command 15

Family: SKH426U1G2RB

Model No.: CV15S

Spec. No.: 41538

Displ (CC): 426

Serial No.: 2534917064



Thank you very very much