Harry/Hazel hamster mix is also a really good mix. It's not as good as Burgess Dwarf, but it's the one I use too (even though I have a dwarf-Burgess is just too expensive)! Here's a link to buying it in the US:
https://www.petco.com/shop/en/petcos...l-hamster-food
Currently it's out of stock, but I'm sure it'll be available again soon.
But since it doesn't contain any meat/animal protein, you'll have to add in mealworms/freshwater shrimp etc.