This is a project I did during my freshman year at high school for my Intro to Engineering class. If you 3D print these pieces you should be able to use them with just a standard size board. I may add a board that you can 3D print in the future if people are interested.
If you have any ideas on how the design could be improved, questions on anything, or anything else please contact me. You can leave a comment or if you need a quick response send me an email at: email@example.com.