Amazon.com: 10X Romer G Mechanical Keyboard Switches Compatible for Logitech G310 G810 G910 G613 GPro Keyboards (Black) : Electronics
ROCCAT Pyro Full-size Wired Mechanical Linear Switch Gaming Keyboard with RGB, Brushed Aluminum Top, and Detachable Palm Rest Black ROC-12-622 - Best Buy
Used Grade B Logitech G910 Orion Spectrum RGB 113-Key USB Wired Mechanical Gaming Keyboard w/RGB Backlighting & 9 Programmable G-Keys - Walmart.com
Here's our full review of the Logitech G910 Orion Spark mechanical gaming keyboard - Neowin