Hey Paul,
I P/M ed you back. Yes your seat tracks interchange no problem. They secure to the bottom of the seat frame with 4 large phillips head screws. I'll put my feelers out for a seat for you.
By the way, Do you know exactly where your current seat is broken( the back,the lower section, the hinge,? ) ? As we discussed Seat breakage was common on these. I know there is a repair kit for the seat hinge area.