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If you know which sizes of connectors you need (e.g.

Here is an example of how that could look (I did this with 3.81mm pitch connector):

It's a simple board, that could be done in an hour - I'd be happy to do that if you need it. If you wanted to have a board with (say) footprints for a range of these connectors, one suggestion could be to have a board design with the connector footprints on the left side, and normal 0.1" pitch layout on the right side. I created a video to get up-to-speed with KiCAD quickly, here: This is an example footprint for the Omron 4-pin single-row version of that connector family: But, Omron offer KiCAD footprints, so it would be easy to build a custom PCB for this, that could be orderable from any PCB manufacturer. However the Omron connectors have pegs that won't fit, they are off the grid. (Connectors with no pegs: 3.5 mm pitch on 2.54 mm pitch (0.1") board: 5 or 6 pin are sometimes feasible (if the pins are thin enough), but it's a tight fit at 6 pins as shown in the photo below. Normal 0.1" pitch boards work for t3.5mm pitch connectors, for up to (about) 4 pins, if inserted diagonally.