To be honest most of the people we work with wouldn’t take on something like that.
At least with envato studio it is moderated and the suppliers are vetted/hand chosen before being allowed to work form there so you have a better idea of what you are getting.
Its hard to suggest not knowing more about what you are trying to acheive but I would always begin the author of the theme http://themeforest.net/user/pego especially as they are ‘available for freelance’