It might surprise you to know, you don’t actually need another physical hi-hat to add a hi-hat to a kit.  

With modules from the TD-17 up, simply assign any trigger zone as a hi-hat sound in the module and you’ll get an instantly playable hi-hat anywhere on the kit such as the rim of tom2. Your existing hi-hat control pedal is all you need to control its opening and closing too. 

If you are upgrading a kit with a CY-5 rack mounted hi-hat, why not move that to another position of the kit to act as a second hi-hat? You can use a VH-10 as your new hi-hat for example and mount that on its own stand for a more conventional drum kit look and feel. The BT-1 bar trigger makes a great compact HH to fit in tight places too!