Amazon.co.jp: Libra LBR-BTK1 (BK) (Blutooth Keyboard, Compatible with iPhone, iPad and PS3) [Electronics]: Computers & Peripherals
Apple Smart Keyboard (for 10.5-inch iPad Pro) - US English - Buy Apple Smart Keyboard (for 10.5-inch iPad Pro) - US English Online at Low Price in India - Amazon.in
Brydge sues Kickstarter for selling iPad keyboard it claims is a clone - The Verge
Keyboard maker Brydge sues Kickstarter and Libra over iPad Pro keyboard with trackpad | iMore
This keyboard case gives the iPad Pro a pretty good trackpad - The Verge