I am not sure what blade you need for your mower, I am not familiar with that model.
As for the Gators we do make a total of three different versions. We make a standard, a high lift, and a magnum. The magnum is a high lift version in 1/4" thick. We don't make all three versions for all mowers.
The Gator is designed to Mulch and discharge. If you plan to leave your mulching plug in place you may actually be better off with the standard mulching blade.