Yes, I do believe there are a lot of them out there. Especially if you get into areas that do or used to grow sunflowers for all the Treflan they used to apply. I bet there's sets of them sitting in sheds all over the place not being used like us. We've got a set of Ag Chem tanks but you can't have them. I'm planning on using them again soon.

Ours mounted to the dozer blade mounts on our 8630. Many in our area were built with a 1/2" plate on each side that bolts to the frame of the tractor along with a couple of 4 x 4 or 4 x 6 or bigger tubes through and between them to accept tubes from the saddle tanks. Made putting them on or taking them off easy.