There are a few tired MH's and MH2's setting around dealers lots the Palouse region. Fewer GH's. I have seen sprayers made out of them. The engine is not too hard to relocate. One problem is going to be the width of the combine, as hillside machines are wide and have big tires. Here is a link to the AGCO dealer in lewiston Idaho. They should be able to help you on price and availability.