I can create exactly what you are asking for and it seems like a great idea. I have an idea of my own that includes putting emphasis on your product by taking up more than just one square, but it depends how well it will look will it be included as the final version of your banner.
I've been working with photoshop editing and designing since I've learned how to do this in the school of arts of Puerto Rico 5 years ago. I've worked with school project editing, brochures, flyers, logos, brands, myspace backgrounds, facebook banners and twitter backdrops, also avatars for online users and experience with my personal projects.
I like to do a great looking job to your instructions and I can't settle for less.
I'm available to work and get wired into this job and finish this in one day, because really, it's a very simple task.
Don't be intimidated by the fact that I can finish this in very little time. This doesn't mean I will do a poor job, but that this task is simple to me and I can make it what you are asking for, for a very reasonable price. If I have to take an extra day for some reason, I will keep in touch with you at all times.