I should check my purchase history, but I probably use Amazon more for buying stuff that they would classify as a "Knockoff", but isn't (i.e. there is no established brand they are knocking off). Because for legitimate brands, I try to simply buy elsewhere.
This is an example: https://www.amazon.com/MiiKARE-Universal-Rotating-Adjustable...
You'll find lots of different manufacturers selling this on Amazon, but there is no well known brand that makes these.