The truth is, now that I have found one, I will probably see them everywhere. If I do, I will snatch them up and let you guys know. I did see one at a yard sale last summer that was still attached to a plow (I think it was for a Ford garden tractor). It was there with a lot of attachments that I couldn't use, but I was willing to buy everything just to get the colter. Lucky for me it was already sold.
Thanks to all of the positive comments on the tractors. I have been collecting tractors for almost 40 years and I never dreamed that I would end up with a tractor this rare, much less 2 of them. At one time I had 7 full sized tractors mostly red ones. I lucked into these 2 tractors and didn't even know how rare they were until I had my first one. It's a lot of fun to take these to shows and have people say " I've never seen one of these before". I reply with "there's a reason for that" and then explain how rare they are and why.