There are plenty of extra buttons on the controller to allow you to map combos to your liking making it just a bit easier to hit all those combos perfectly. (nintendo-okie.com)
The in - line remote is a little more complicated than your standard control, due to the addition of a couple of extra buttons for controlling the level of noise - cancellation. (techradar.com)
How about buying something similar somewhere and sewing on a few extra buttons to mimic the idea? (effortlesslywithroxy.com)