My uncle has two Cat 22's, 2F4112 and 2F4580, looking to get a shop/service manual. He has the operator's manual, and I've found the parts manual. Service manual must be as rare as hen's teeth! Searched everywhere. I would be happy to pay $100 finder's fee to be able to buy one of these. He's 84 years old and time is getting short...if you can help, please let me know! Thanks!