Dave, my seat is also split along the top due to being out in the weather all its life. I fold it down, but the top edge is exposed to all the sun. Lately, I've been looking at an inexpensive (less than $100) seat at TSC. It's a single piece seat the same as mine. I just need to remove my seat and take some measurements, but I believe the TSC seat is almost identical to my OEM seat. I would guess yours is pretty darn close too.