Here's one made with cake and fondant from you tube
If you don't need one this big you could probably make it a lot smaller with less cake and fondant if you already have a big cake to go with it. I am no expert but thought I would put link from one I saw someone else make since I see no one responded to you.
Bakerella did a Burgers & Fries project a while back. She includes printable templates for both the fry envelope and the little food trays. You could sub out the text or design on one or the other with the KFC logo??
Here's the link to her site: http://www.bakerella.com/fast-food-fun/
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