I searched Yahoo Yellow pages for business' with Duke City in their name and got 51 hits. So I printed the page and started to take off looking when I realized I didn't have a clue how I was going to do it. So off to Office Max where I bought a city map and back home where I plotted them. Now I can get at them more systematically. Here are the first 5, I don't know when I'll get around to finding more and posting them.
(clicking on the picture will take you to my photo page where you can download the full size version)