Shimano Tx50 3X6 Speed 3X7 Speed Shifter for MTB Mountain Bicycle Bike 18 Speed 21 Speed Thumb Shifter Plus Accessories - China Bike Shifter, Bicycle Shifter | Made-in-China.com
Shimano Tourney SL-Tx50 Bike Bicycle Shift Lever 3X6s 3X7s 18/21 Speed Tx50 Shifters Gear Cable SL Tx50 Shifter Trigger Switch - China Shimano Bike Parts, Brake | Made-in-China.com
Shimano TOURNEY SL TX30 Shifter 3X6s 3X7s 18 Speed 21 Speed MTB Mountain Bike Bicycle Thumb Gear Shift Lever Set - AliExpress
Shimano 6 Speed Rapid EZ Fire 18 Gears shifters Brake lever pod combo ST-EF41 | eBay
Microshift Mezzo Ts39 8 Speed Thumb Tap Shifters - Gearing - Drivechain - Components | Pedal Power, Scotland's Bike Shop