Controller Button
From Amazon
Thrustmaster ESWAP X LED BLUE CRYSTAL PACK, Pack of 7 Backlit Blue Modules, NXG Mini-Sticks, Hot-Swap Feature, Compatible with ESWAP X PRO CONTROLLER, Xbox Series X|S and Windows
Conrad Electronic
Thrustmaster eSwap X LED Blue Crystal Pack Accessory kit PC, Xbox One, Xbox One S, Xbox Series X Blue
Viking Direct
THRUSTMASTER Gamepad Modules ESWAP X Blue