new rear axle suspension?

That would be great for those of us who farm in parts of the country where we have to rely on surface drainage with "water furrows", which are small field drains made with a pto rotary ditcher. When we cross them we have to slow to a crawl. The big tires on the front aren't too bad but when the back axle hits them it lurches pretty badly and can really slam the header around when you're cutting beans, running right on the ground. I've often wished for the ILS on the rear.