The squeaking is probably the power steering belt. Tighten it and look for wear.
The bumpy ride is your blown 8 year old suspension. Like my 12 year old suspension
As far OEM parts, go to a local auto parts store. They should have everything for WAY cheaper than Satan could ever offer it for. I had to get new rotors, ball joints, tie rod ends, and some other stuff to get my GSX on the road... It all cost 734 dollars at Satan, and 231 dollars at the local store. Screw the dealer