I just picked an extension up at Saskatoon Cabela's. It is an 18" Eskimo, and fit's my Rapala Nirto 43cc (essentially a rebranded Eskimo Mako). I phoned everywhere in town (CT, Wholesale, Princess auto, Peavy Mart, Walmart, Fishing Hole) none had any left for the season.
Cabela's only had 18". There were 3 left at 11am Feb. 23. I wanted 12", but 18" is better than nothing. I ain't that tall, and i'll probably have to stand on the tailgate to drill, but at least I'm drillin/fishin!