Yes you are right the A4 variant is very popular among model manufacturers.A year ( or maybe two) ago I prepared the pic for Pisis who was interested in the conversion into C-6 version.
http://www.ww2aircraft.net/forum/aircraft-picture-requests/junkers-ju-88c-6-winter-camo-4909.html
http://www.ww2aircraft.net/forum/aircraft-picture-requests/junkers-ju-88c-6-winter-camo-4909.html