I have some specialty in Django admin customization, including vastly altering the administration of existing Django applications without modifying them, improving user experience through progressive enhancement of widgets. I've been working extensively with Django for the past four years.
My bid is based on a the customization of one or two django app admins being done one week, and tweaks and fix ups being done the second. You haven't given much detail about the actual customization you need. Can you give any such details?