SW20 90T Driver Seat needs work / replacement.

  Hi, 

 
Besides the side piece, the base has collapsed about 1" again at the back. I had it repaired a couple of years ago, but it has failed again.  Car is stock looking, except for wheels, so prefer not to put in racing seats like Recaro (if they're still around).
I imagine seats from the wrecker are likely to be in similar condition ??  
 What have others done ? cheers