The only source I know of for moose hide choppers is Henry’s Shoe Repair in Ely, Minnesota, assuming they still are in business. I doubt they have a web site, but if you were to call I’m sure they would mail order you a pair. Don’t forget to ask for liners with them.
Grouse
Here you go.
http://www.henrysshoerepair.com/moosehide%20chopper%20mittens.html
I read online that Henry passed away in 2010. Does anyone know if someone took over his shop or still produces the choppers?