If it were me I’d make one up on Veroboard and that would be it. However it does look rather sexy made from SMD components. It’s years since I etched a board, maybe 18+. IF you really want a board, get the PCB files from the website and send them off and have 5 boards made with masks etc. for £15 or whatever. Make up one for yourself and sell the spare PCBs to reduce your costs.
Ed’s correct that Eagle is the go to shareware/free PCB program. The free version was has limits on the number of tracks and components it supports. It works, there’s loads of tutorials on using it and most prototype PCB companies support Eagle files.