In Israel, many supermarkets and large pharmacies carry
bedikah cloths. They are usually in the feminine hygiene section and are in either plastic packets or small boxes. You can also order them online on supermarket and pharmacy websites.
There are different brands – and say on the package "Taharah", "Badei Tzach", "Edei Tzach", "Sarig Tzach", or "Edei Tohar". If you can't find any in your area, you will definitely be able to find them in supermarkets/pharmacies in religious neighborhoods. They are also sold at the mikveh.
B'Hatzlacha!