I fixed the New N64 Controller's Thumbstick because I hated it - YouTube
Amazon.com: 3D Replacement Joystick Analog, Thumb Stick for Nintendo Switch, 2-Pack Joycon Joystick Replacement with 2pcs Thumb Stick Caps & Screws (White) : Video Games
RepairBox Replacement Joystick for N64 : Video Games - Amazon.com
This improved N64 joystick extends the lifespan of your controllers | N64 Today
Set of 2 New Replacement Joysticks for N64 Controller (Nintendo 64 Thumbstick) | eBay
Replacement joystick for Nintendo 64 N64 controller | ZedLabz