Hi jre021152,
Welcome to the Mattress Forum! 
If you scroll down through post #1 of the foundation thread here, there is a section with the heading Slatted platform beds with links to quite a few DIY platform beds. Besides what is listed there, you can find many free online plans and even videos showing how to make a simple platform bed. Overall, it is not a difficult task.
Feel free to share any photos if you make one on your own ā Iād love to see it.
Phoenix