There really aren’t that many great choices for a dwarf hamster here in the US lol! I don’t know if you have looked on amazon yet, but they do sell it. It is a bit pricey but will pay off in the long run knowing that your ham will be healthy eating this food. Maybe, if your neighbor, family member, friend etc. is traveling to the UK (or somewhere were they sell it) you could ask them to get you a 2 bags of Bunny if Burguess and bring it back for you. If your family, friend etc. is far away, they can mail it to you and I bet it will still be a lot cheaper.
Link to Burguess (they don’t ship Bunny to the US)
Supa Hamster Supahamster Dwarf Hamster Harvest 700Gm
https://www.amazon.com/dp/B003ZGE25A..._8DlEBbWEWES3R