All campbells/winter white hamsters you see in pet shops will be hybrids (a mixture of both). You would only be able to get a pure campbells or winter white from a good breeder.
I expect you would be able to find a hybrid with the normal colouring (brown with the black stripe) from the pet shop. I see that colour often but I am in the UK and I assume you're in the US as you talk about pet smart
