My inspection of the car found it needed a bunch of parts including the air filter mounts you mentioned, the ones on the car were completely separated. The filter housing is just sitting on top of that little metal tube with the completely worn out o-ring. Here's a list of what I ordered in the way of parts so far.

Driver side door seal
Rear door check strap
Front door check strap
Front brake pads
Front brake rotors
Rear brake rotors
Rear brake pads brake
Set of windshield wipers with blades
2 front shocks
2 rear shocks
2 OEM motor mounts
1 OEM transmission mount does not have oval tube in it
brake fluid 5 liter container
AT filter kit
4 engine belts ie all of them
3 oil filters
1 fuel filter
1 fuel pre-filter
EGR backpressure filter
air cleaner mounts
air cleaner filter
power steering filter

Can anyone think of anthing else that might be worn out or maybe in need of service?