Logitech G903 LIGHTSPEED Wireless Gaming Mouse, 12,000 DPI, RGB, Lightweight, 7 to 11 Programmable Buttons, Long Battery Life, Compatible with PC / Mac - Black (German Packaging) : Amazon.co.uk: PC & Video Games
4pcs Replacement Side Buttons G4+G5+G6+G7 For Logitech G900/ G903 Wireless Mouse | eBay