The US (and Canada?) got ugly turn signals with halogen bulbs instead of the nice slim LED available in other markets. Probably due to some DOT regulations.
The KTM dealers in the US cannot order the EU parts. It is possible to order the original parts from a shop in Jersey and this come with a replacement flasher relay (otherwise just replacing the turn signals will make them blink very fast).
Other outfits will propose LED blinkers.