Hi
Well it looks like I will be making a break out board, but not like either of the linked designs.
I will make use of the connectors I have in the photo.
I got the Centronics gpib connectors from Aliexpress because they are dirt cheap. I purchased the HP logic analyser compatible connector to see if it would fit. It does, that gave me a solution looking for a problem.
I will design a board that will connect directly to an HP logic analyser, that I don't have, or my HP 54645D mixed signal scope that I do have.
The logic probes designated for the HP54xxx series scopes have the probes integrated with the flat cable. They are rare an expensive.
I purchased the cable and probe set that plug together. Easier to find, cheaper and more versatile.
Along with the Centronics connectors, and HP compatible connector I will include pads for a separate header to make it easy to probe individual lines, if ever needed. Probably a feature I would never use but extra pads are a zero cost.
I will be able to save a configuration in the scope, and just plug and play the break-out board. The board will still be usable for someone without a logic analyser.