here is a good chart to use...
Most people go by the MFG size but I've had better luck going with the Actual diameter. If you keep the 32's that you have I'd run a 42 tooth.
You can order these all over the internet/// 4WD, quadatrac, 4wheelparts, and so on.
But it is easier and faster to just pick one up at the Dealership. They can get them and usually at the same price or better due to no shipping cost as the online places.
And welcome to WF!