Digital illustration of a tree and skyline

Design details: Looking for someone to digitally draw a tree similar to the style of image attached ... with a bow bridge (new york) skyline behind and horse and carriage. It's to be used as a wedding guestbook print.
Ideas for the visual style: see attached image
Preferred colors: fall colours
Where the design will be used: print
Extra notes:
Please note Im located in New Zealand so time difference may mean a delay in replying to any proposals :-)