I could not find an extension anywhere in Bismarck. Decided to drive to Sweetbriar and drill holes. I punched 2 and decided that is where I will take them tomorrow and hope they get a chance to catch their first fish thru the ice. Thanks for the info guys and I'm ordering an extension today.
Extension not needed in Valley City area today, but I was right to the head of the auger at the top of the ice. Another stretch of cold will force the extension.