Most of my footswitches as well as my 1/4" plugs are all made for me under my designs/manufacturing contracts; so you won't find the exacts out there on the market. I also custom design circuit boards for even some of my smallest switches.
There's a few knockoffs that have actually shown up by non-US manufacturers (which I think is cool I'm being copied that largely), have some pretty crappy parts/reviews. I've talked to a few people who have ordered them and came to me to complain and the consensus was "not worth it", but YMMV.
The alternative/comparable short footswitch, Suntsu AC05, has been out of stock on Digikey for months. Of course that's only SPST Momentary Normally Open. You need to account for a lot more wirings then just that like Latching on the Wanderer, Momentary Normally Closed for Boss, and depending on the pedal TS vs TRS plug (yes some 1 button pedals use a TRS plug with custom circuitry), or things like SourceAudio's TRRS 3.5mm plug with even crazier wiring.
