I would recommend ordering the Burgess dwarf food off Viovet if you have a dwarf species,but for Syrians Hazel Hamster is one option as well as mixing Higgins and Mazuri to create a balanced diet.Dwarf hamsters have much less options in terms of diet,but it isn't impossible to make it work!
Even for Syrians having loads of sugar isn't necessarily healthy,so even if you don't have a diabetic prone species you should make sure your main diet is as natural and healthy as possible.
Hazel Hamster might not be available in all Petcos in store if you have to use that by the way,but if you have to order it online you can order it from Petco and various online pet stores
