Designer Needed for Circular Chart

We have a very time sensitive, urgent project underway and we need some one to do the artwork for a retail display unit that will hold gift cards. We have already completed the design except for one part of the unit that is a flat, rectangular area of 427mm x 540mm section. We want to fill that space with a cartoon or pictorial style representation of how the gift cards work. We have the copy and the concept in place, we just need a graphic that helps illustrate the concepts that we have in mind. In other words, the graphic will be diagram how the cards work in a friendly, green theme.