Hi there,
I really like your project and I would very much enjoy doing the island map/areal view. I understand your idea, and since I'm a traditionally educated artist, I think I could meet your expectations with a detailed pencil drawing. We could work together, as you suggest, via chat or skype for couple of hours, and then I could finish the drawing in detail in the following week. I could send a high resolution scan of the drawing or the original, upon request.
Please contact me if you are interested. I'll be looking forward to hearing from you.
Kind regards,
Dusica