I worked in conjunction with iStudio Publisher to write a post about how you can take your kindle singles (or anything at all, really) and turn them into a physical book. All it will cost you is 17.99, and whatever time it takes you to write a book and to edit it and so on (maybe ten years, maybe fewer). If you're looking for an affordable desktop publishing program, I recommend iStudio Publisher. It is easily one of the best investments I've ever made. I'll be using them again if I have more books that I own physical rights to but not digital. The word is out; people still like physical books.
See the post here: iStudio Publisher Blog Post.