This Logitech-inspired mouse comes with a side scrolling wheel we'd definitely want to try - Yanko Design
Amazon.com: BestParts New Mouse Wheel Mouse Roller Scroll Replacement for Logitech G403 G703 Gaming Mouse : Video Games
Amazon.com: Logitech M545 Wireless Mouse – Side-to-Side Scroll Wheel and 2-Thumb Buttons Make Computer and Laptop Navigation Effortless, Ergonomic Shape for Right/Left Hand Use, USB Unifying Receiver, Black