Your search for "handlebar clip-on" revealed the following:
SCRAMBLER DUCATI DESERTX Urban accessory package
$1,214.40Maximum riding pleasure and practicality during your daily travels, whether in town or in medium range touring, thanks to this...
CPPI04 - 7 BUTTON HANDLEBAR STREET SWITCHED
$396.757 buttons, replaces the oem in plastic, keeps all functions. Already wired, ready for fitting in 10 minutes