Do you have any ideas of what you want on the box??
ANY graphic designer who does vinyl will be able to do what ever you want/create... Where abouts are you??
I use a guy local to me who has liveried all 6 of my vehicles and I think they look ace... he went through everything with me... I gave him 3 different designs and he gave me a list of pro's and cons because of where I wanted them on the vehicles... I wanted them to be BIG impact and make a statement... which they sure do
Id say, just be careful. I got a quote from one company for something basic and I thought it was a bit pricey. I got another cheaper quote form someone else, so told them what I wanted and they just went and did it without me knowing, despite them saying they would show me it on a computer first. It was awful and I was mortified, it wasnt even the colours Id chosen so thankfully they managed to pull it off without damaging the new paint job underneath.
Suppose its the old you get what you pay for.