KDD Airplane Tablet Holder Mount, Adjustable Travel Essentials iPad Phone Stand with 360 Degree Rotation, Portable Tesla Model 3/Y Car Headrest Mount Compatible with iPad, Cell Phone

I use this one. It's a little finicky. You have to unscrew to stretch out to size, but once you have it on it's very secure. Fits a Switch 2 the long way without the joycons on, not that I'd want the holders to be squeezing on to the joycons anyways. If you have the money I'd suggest getting the parts needed from Mechanism. It's easier to work with. Much more comfortable to have the Switch mounted in front of you, imo. Playing it in handheld mode with your neck bent down when you don't have much of an option to stretch your muscles is a pain.