Twelve feet is about the traditional length for a canoe pole in Maine. You can start a good debate about whether ash (stronger, heavier, more available from lumber suppliers in longer lengths) or black spruce (lighter, springier, more available for cut-your-own in the bog) is the appropriate wood.
Several styles of shoe used to be available from Peavey Manufacturing in Milford, ME. They provided poles and various kinds of shoes and tips during the log drive days. Sadly, they went out of business a few years ago.
I have a 12 foot ash pole with a metal sleeve on one end from Peavey that I use in my canoe and to pole both my sculling boat and my tin boat. It works just fine.
If the shoe ever wears out, I've considered replacing it from one of these sources, but haven't bought from them so can't vouch for quality or service:
http://www.bghooke.com/canoepole.htm
http://poleandpaddle.com/products/pole_shoes
I know other people who have bought paddles and gear from Pole and Paddle and were pleased. Their "point with hardened tip" may be what you described.
http://nwwoodsman.com/Product/Tools/TrailTools/PolingShoe.html
I'd also suggest posting on the web forum for the Wooden Canoe Heritage Association. I'm sure you'd find lots of suggestions on poles and shoes there.
http://www.wcha.org/