We do have memory card suppliers. I've provided a few below worth checking out:Link hidden: Login to viewLink hidden: Login to viewLink hidden: Login to viewLink hidden: Login to view
Make sure you contact them directly in order to get their true wholesale pricing which is always better than you will see on their site. When doing this provide them with the quantity you are ideally looking for, where you want them shipped to and how often you plan on purchasing - this helps gets the best possible price.
Hope this helps! Let me know if there is anything else I can help you with. :)