Amazon.com: Tactical Flashlights 1200 Lumens with 3 Modes Weapon Light and Pressure Switch Included,IP65 Waterproof Flashlight with USB Charging Stand, Keymod/Mlok Mount System for Rifle Light : Sports & Outdoors
All about switch types for flashlights and head torches
HOW TO: Flashlight Mechanical Tail Cap Switch Replacement - YouTube
Flashlight Switch Tail Button Flashlight Switch Replacing Spare Parts Suitable for 501B Flashlight - Walmart.com