Hamster food on Etsy! Sellers there have sprays, seed mixes, and treats for a good price. They sell from USA, Germany, Singapore, etc. and really care about hamsters. Suggested sellers: RobinsGourmetFood, WonderHamsterShop,
Supreme Science Selective Hamster Food 350g : Amazon.co.uk: Pet Supplies
Choosing an Appropriate Hamster Food: with an Introduction to Homemade Diets
Tiny Friends Farm Harry Hamster Food Tasty Mix Muesli 700g | Pets At Home
How to Make Your Own Organic Hamster Food: 10 Steps