In Germany we've about 15.000 kebab shop's, so nearly everywhere.
They're producing 200-300 tons per day mostly as 'Döner kebab' and the rest as 'Döner Dürrüm'.
Here the döner is nearly always put into a Bread or something like that, so you could say döner-to-go.
Döner Kebab:
Döner Dürrüm: