Yup, that's route I would try to go down, at least initially.
http://cgi.ebay.com/ebaymotors/Recar...Q5fAccessories
I can check my parts binder, but I would be willing to bet the seat is a part by itself and internal parts are most likely not available alone from Merlin, but I could be wrong.
So lemmi guess, a whole bunch of drunk kids tried to all pack into the front seat and put to much pressure on the back?
Bart