https://www.tuxaccessories.com/

They have the Burger King Manager striped tie and the flag tie available. No idea if they'll be able to sell the new pattern that just came out, since it includes the company logo.

I've used them for a couple of years. They're OK, but they lack the locking tab that some zipper ties have, meaning it comes loose a little too easily, especially after a few months of wear.