Surprisingly Good third party wireless controller review in comments : r/n64
Retro-Bit Tribute 64 2.4 GHz Wireless Controller for Nintendo 64 (N64), Switch, PC, MacOS, RetroPie, Raspberry Pi and Other USB Devices - Classic Grey - Walmart.com
Buy N64 Controller: Retro-Bit Wireless Controller (Grey) N64 Australia
2.4G Wireless Switch Controller for Nintendo 64/Switch/PC Mac Window Rumble Pak | eBay
N64 2.4G Wireless Controller for Nintendo 64 (N64) Switch PC Mac RetroPie Linux | eBay
Wireless Controller for Nintendo 64 N64 Console PC Windows Switch w/ Rumble Pak | eBay