I created a PCB project for the 4116 RAM tester for you to use if you wish. Included are all the files you would need to get a board made. I’ve also included the KiCad project files. I might sell kits in the future if anyone would be interested in that but for now here is a download for the files. https://www.kosciuskomedia.com/4116_Tester 2.zip
I’ve also added them to the GitHub repository where you can find all of the project information as well. https://github.com/DLXXV-Kelvin/4116_RAM_Tester
Here are some 3D images of the finished product, although it is missing a few components that will be added into sockets, etc.