Pay phone looking cell phone mod

Here’s a great cell phone mod from bernardroth’s Flickr page. It’s a standard looking payphone headset with metal cable converted to be a headset for a cell phone. I’m going to see where and if you can buy these…ya know, I had heard that many phone companies are removing pay phones, I wonder what they do with them. If I can score a phone handset, I think I could make an app for my Pocket PC phone to only dial phone numbers if I use my old redbox.