I have the sport seat option in my '90 that are adjustable in every direction known to man, and then some. The switches on the seat itself to adjust lumbar, side supports and tilt back have died. I can not find this in any part store. Does this mean it is a dealer part, and will it cost me lost of money? Would it be easier to take the switch apart and clean the contacts? OR, has this part been discontinued and I cannot get it anymore?