You can get everything at a major store like Wal Mart.. Foot powders: https://www.amazon.com/Odor-Eaters-Foot-Powder-6-Ounces-Pack/dp/B001G8Y9WK?th=1 https://www.amazon.ca/Scholls-Odour-Destroyers-Medicated-Powder/dp/B00BMHYJMA

Silicone spray: https://www.amazon.com/Kiwi-Camp-Heavy-Water-Repellent/dp/B01LWIT5Z6

I can usually find the silicone sprays at Walmart for about 6USD converted (I'm in Canada). I use them after washing my winter jackets, anyway.