@kmccue
There is a sports shop, Cristal Sports in Orsières. It is one of the places that can supply snowshoes to rent for people walking in the snowy months. It was closed when I passed on a Saturday evening (but I had not planning to go), but I presume they would have poles.
Magasin de sport spécialisé l'hiver dans le ski-alpinisme et le ski de randonnée. Nous avons également un large choix de skis all mountain et skis alpins.
yellow.place
Martigny is a significant town and presumably would have a sports shop also.
PS if you hire shoes there you send them back with the post van when you get to Italy!