FPV Retailers
There are many retailers in the USA to obtain FPV hardware. I've listed a bunch below. All of these I have purchased gear from at least once. Please note that a lot of the youtube channels (from the "Education and Information" page) have affiliate links to most (if not all) of these retailers. If you find the content of their channels helpful, consider using their affiliate links to help support their channel. It costs you nothing and helps out the content creator.