This will fit on some lawn mowers other than Exmarks. For reference check your bolt pattern: bolt pattern is 11 1/4.
The item "126-8290 EXMARK ZERO TURN SEAT WITH SEAT BELT & ARM REST" is in sale since Monday, June 14, 2021. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Lawn Mowers, Parts & Accessories\Lawn Mower Parts".The seller is "bicountyengine" and is located in Columbia, Illinois. This item can be shipped to United States.