lol funny story I actually found one of these '65 dated out in the bush where some kids were using it to build fortifications for their soft air games (yellow and lime green bbs all over the place). This thing was left out in the bush, and it only had minor surface rust, the wood was just a strong as when it rolled out of the original factory. Definitely an excellent piece of kit.
Googled around for you but I could only find some for cheap on ebay
these guys want 50$ for an unissued '67
http://www.armynavysales.com/products/m1951-intrenching-
tool-shovel-/-pick-unissued-1967-dated/
30$ used
http://www.armynavysales.com/product...l-/-pick-used/
I haven't seen any in canadian stores