If you're going to create your own board, you could make small modifications to the layout so that it will take modern keyswitches. You can buy bags of those on AliExpress for a few bucks.
I am working on a redraw of the Atom PCB and would be interested in scans or the board itself.
I photographed the front and back of the bare Atom PCB I had (mentioned earlier in the thread), before I built it up with parts. They are 4000 x 3000. If you want them, let me know.