These are some reccomendations for hamster supplies. Hopefully this will make your search for supplies easier, whether you buy these products or they give you ideas.
*This is not an advertisement for any of these products, it is simply a list of some products I found that are good for hamsters.
Click on underlined words for links!
Cages
75 gallon tank - about 900 sq in of floorspace
55 gallon tank - about 615 sq in of floorspace
*I say about because there are multiple measurements on the website for the product
COZIWOW Wooden Hamster Cage - double door top is about 504 sq in of floorspace and single door top size is about 876 sq in of floorspace
Wheels
Kaytee Comfort Wheel - 12 inches for Syrian hamster and 8.5 inches for dwarf hamster
Silent Runner Wheel 9" - for dwarf hamsters
Silent Runner Wheel 12" - for Syrian hamsters
Platforms (to put food bowls/water/a wheel on)
Niteangel 7" Platform - stick it in bedding so you can have a hard surface above bedding
Hides
Niteangel Multi-Chambered Hide
Food & Water Containers
BUCATSTATE Hamster Water Bottle with Ceramic Holder
Kaytee Clear View Water Bottle
Sand Baths
Zoo Med Reptile Sand (many sands made for hamsters, even those labeled as dust-free, can still be dustier than should be, and this may be safer; I use this sand for my hamster)
Chews
Sweet Bamboo, Apple Branch, and Timothy Hay Chew Sticks
Bedding
Hay
Food
Sprays & FLowers