"The Extender" is on our CR 960, and is available for all models. Seen one on 8010 and CR 970 at the Ag Expo in Minot, ND last week. Stewart Steel out of Weyburn, Sask. sells them along with some other things. I believe they come in 3 different lengths of down spouts. It adds 3 feet to the auger, the either a 15" - 36" down spout.
We sell the Calmar extension it goes on the end of your auger and gives you more length. It also has a built in overfow device, also will let grain come out in a nice steady stream. We are in Sask. post back if you want more info
Check out the above picture. I believe this is the setup you are talking about. The auger was long enough to easily unload on the go while pushing a 40' flex draper. Note that the header in the picture is only a 30' however.