Not sure why you are asking this question anonymously.
There are countless companies, large and small, that deal with medical supplies all over the country, so if you are using them for a company, just go contact them.
If it's for personal use, you can get them at the drugstore.
If you're making a large corporate purchase, I have clients who deal with these types of items and can put you in touch.
I hope my answer can help you.