NHL Fonts for custom Stiga players
There is a site called "Puck Marks" that has jersey and number fonts for all NHL teams. It appears to be all the modern fonts though, so I'm not sure if that would necessarily help you if you're working on original six teams and looking for accuracy from a certain year. As well the Rangers number font seems to be backwards too, if you're looking to use it. Outside of that, it should have everything you need to get started.