The original seat is some what uncomfortable on my lower back. so.......
Without, a reply, I was doing some homework I removed the seat and found that the original seat attaches with a 5/16" screw and a 1/2" screw in the center of the seat. The switch is not part of the seat, as the switch is located in the 2 piece bracket below it.
It looks pretty straightforward, so I ordered this seat which by looking at the bolt pattern should work. It's sold thru Amazon or other places for around $55 bucks. (A & I Deluxe Midback Utility Seat Black, Model# TM555BL) Dimensions W x D x H (in.) 18 1/2 wide x 19 1/2 x 16 tall.
When I receive the seat I'll update this post for anyone who may want to replace theirs.