RetroPie Accessories

Power Supply:
https://www.amazon.com/PiTech-Raspberry-Universal-Adapter-Charger/dp/B01DTDDDMQ

Heat Sink:
https://www.adafruit.com/product/3082
https://www.adafruit.com/product/3084
https://www.amazon.com/LoveRPi-Performance-Heatsinks-Raspberry-Model/dp/B018BGRDVS/

Cooling Fan:
https://www.adafruit.com/product/3368

Keyboard/Mouse:
https://www.adafruit.com/product/1738

NES Case:
https://www.amazon.com/Functional-POWER-Button-Retroflag-Rasberry/dp/B073ZC4TZY

NES Controller:
https://www.amazon.com/Classic-Controller-Extension-nintendo-entertainment-system/dp/B07548BVX5/
http://www.raphnet-tech.com/products/wusbmote_adapter/index.php

SNES Controller:
https://www.amazon.com/Buffalo-iBuffalo-Classic-Gamepad-BSGP815GY/dp/B06XWD8QQJ

Genesis Controller:
https://www.amazon.com/Hyperkin-Inc-Genesis-GN6-USB-Controller/dp/B00KX75UT6/

Nintendo 64 Controller:
https://www.amazon.com/gp/product/B008L3UUPS/

Bluetooth Retro-style Controller:
https://www.amazon.com/8Bitdo-Controller-Bonus-Carrying-Case/dp/B01LW7JJPJ

PS1 Controller: (Actually a PS4 controller)
https://www.amazon.com/DualShock-Wireless-Controller-PlayStation-Black-4/dp/B01LWVX2RG/