Extender makes an attachment that you put on the end of you auger it adds probablly around 2 to 3 feet I am not for sure. Put one on my combine and with a 36' head no problems at all unloading on the go.
Beans, Check "onlookers" post about Stewart Steel nose cones, dated 10_18,it gives you the Stewart Steel web page. They offer two options, one is a 36" extender, the other is between 30" and 36". They are well made and they work. We have used both kinds.