I purchased a 2000 Caterpillar TH83 with some boom parts missing. tilt cylinder, hydraulic lines, chain and internal hoses. Since this is a fairly new machine I thought I would not have any problems getting these parts. I sold this machine "as is" to another wholesaler but now he is telling me that most of these parts are no longer available in the Caterpillar system. Is this Possible.??? I know Cat has parts for machines 30 years old. I need help!!! Does anyone knows where I can find these parts?? My customer claims that a cat dealer told him the parts are discontinued.