people love to steal parts off of 4th generations. they are made very well and parts r expensive even at that age. even if he left the doors unlocked they r easy to break into. saved him the trouble of repairing the glass n door. he can get prices from a junk yard. try
www.hondaautoparts.com for some things. i doubt they have seats but they would have trim items..tail light assemblies r on there i just replaced mine on my 92..