sounds like you were after an as-new 'perfect' condition '89 and should have commissioned as comprehensive a PPI as possible- this type of PPI would have noted every little non-showroom/ non OEM aspect of the car

if you have a detailed written legally binding contract representing the condition of the car (specifics) contrary to its true condition, you most likely have no recourse back to the the seller/ PPI company

if this is the case, I'd just spend the money and get the car into the condition you desire...all '89 vintage cars will need work here and there in an ongoing basis- even ones with low low mileage

some of the issues you observe now- - truely may have occured after delivery/sale (vs being pre-existing conditions)

good luck and let us know how this turns out
-fad