At the time of launch, Microsoft was the only vendor that had buttons in stock. All the accessibility sites that sold custom ones were sold out. I did buy a mix of loose arcade buttons with the idea to create my own. I gave up on that once I saw the Logitech kit. It’s built nicer than what I would have been able to build myself, with way less effort. I’ve bought one joystick off Etsy to use with my feet. It’s custom made with a 3d printed shell, it’s nice but it was also $45 for a single input. Ughhhh.