re: Thin cut catfish filets...where to buy online??

If the fillets are big and thick you can slice them as they thaw. That us what I'd do. Call a wholesale foodservice supply house and see what they have.

Edited to add. Read the other posts who all said what I said only quicker and worded better.

Do you have a sam's? They carry delta pride smallish fillets usually. Wally world may carry them too. I have seen them at Jewel in Chicago, so Delta Pride catfish gets around.