Amazon.com: Logitech Signature M650 L Left Wireless Mouse - For Large Sized Left Hands, 2-Year Battery, Silent Clicks, Customizable Side Buttons, Bluetooth, for PC/Mac/Multi-Device/Chromebook - Graphite
Amazon.com: Logitech G600 MMO Gaming Mouse, RGB Backlit, 20 Programmable Buttons, Black : Video Games
Logitech M510 Wireless Mouse with Laser-grade Tracking
Amazon.com: Logitech Signature M650 Wireless Mouse - for Small to Medium Sized Hands, 2-Year Battery, Silent Clicks, Customizable Side Buttons, Bluetooth, Multi-Device Compatibility (Graphite) : Electronics
Logitech Mouse: how can I use additional buttons? - Ask Different
How to Remap Your Extra Mouse Buttons for Optimal Productivity
Replacement Side Left Button Side Keys for Logitech G Pro Wireless Gaming Mouse | eBay
I never thought buttons on either side of the mouse wheel would be so useful. Now I can't imagine using a mouse without it. (More about the key binds in the comments) :
Mouse Side Button Side Keys Set For Logitech G Pro Wireless Gaming Mouse Left Up + Left Down Side Keys Repair Kit - Accessories - AliExpress
Left/Right/Up/Down Mouse Side Button Key for Logitech G Pro Wireless Mouse | eBay
1Pc Replace L R Side Keys Side Buttons for Logitech GPro Wireless Gaming Mouse - Walmart.com