Hey there!
First off, I think this is a GREAT idea! Do you have the dimensions of the car or maybe the template that metro wrapz used? And do you have a logo I could see, or any brand colors you want me to use? Anyway, my process would be to first provide you an initial round of drafts, and revise those based on your feedback, until we reach something you love : )
I could start working on this right now, just let me know!
Cheers!
Don't forget to check out my profile for examples of my work and my feedback
https://www.freelancer.com/u/certaintly.html