Yes, there are some privately modded bus (blended from so much other mods).
All buses "modded" with K++ displays.
-Mercedes-Benz Citaro G CNG (4 door)
(-Mercedes Citaro CNG - WIP)
-Mercedes-Benz Citaro Facelift (G, GÜ)
-Mercedes-Benz Citaro C2 (G, Capacity L)
-Solaris Urbino 10,12,18
-Solaris Urbino IV 18 (4 door)
(-Volvo 7700A - if it would be ready, it would be contained)
Citybus i280 (i260 ?) (when the map will be ready, I will create the destination signs for them).
-Tatra KT4D (currently I try to make a K++ mod for it)
(-Tatra T6A2 - when it 'll be available)