Go to the E Bay Official Website catagory listing
then click on All Catagories
then look under the title section of Business & Industrial
then click on Agriculture & Forestry
then click on Antique Tractors
then click on Ford Tractors.
I saw a beautiful Ford 1042-3 Air Force Tarmac tow tractor/machine on this site Saturday while looking through only about 500 of the total 2,100 Antique Ford for sale ads. The machine had the original military paint and stenciling still on it.
There are around 24,000 total tractors at the present time listed for sale on the website so I'm sure that you will find many more.