Online Emulator for app styling

HI. I have built a mobile app for both iOS and Android that i will use as a Template for my costumers. That means that all the windows, tableviews, labels, textareas etc will be the same but the background pics and color layout will be different. I get all my content from the costumers Facebook page. Pics, notes, feed, events etc. What i need to be built is a iPhone "emulator" that will show how it will look with their facebook page. In other words they will put in their facebook page ID and then all the content will show in the "emulator". They should also be able to change the tabbar color, win background color, text color, bordercolor, fontcolor etc. I think this is a pretty easy job to do for the right person that understand the specs. Thanx