I just installed this seat from TSC on my
BX2350.
Premium High-Back Seat, Cordura - For Life Out Here
I bought mine from family farm and home because it was $30.00 cheaper.
TSC also has a similar seat in vinyl for $209.00.
Back folds forward and back just like a car seat. has adjustable lumbar support and arm rests that adjust to the angle of the seat back.
I went with the codura nylon rather that the vinyl because I know from experience that it holds up better plus my tractor is in the barn any time it rains.
I have lower back problems and the adjustable back rest and lumbar made a world of difference.
It is supposed to be universal but the tracks would not spread far enough but I was able to bolt my original Kubota base to the seat with a little modification. That also allowed me to keep the seat belt which is attached to the seat base.
The only problem I have encountered and I don't consider it a problem is that the seat is heavy enough that it keeps the safety switch depressed.