Yea, I forgot about the sides of the 2x5.
What about something like this, but of course a 2x20 instead of 2x25.
People could even make their own shorten the remainder.
I don't understand what I'm looking at.
At present, I am planning to provide a pair of 1x5 dupont connector based cables, that I can get off-the-shelf so I don't have to build them. That may at some point switch to single 2x5 dupont cable if I find a supplier.
I have no interest in manufacturing cables.
The quality of the cable is important. ElectricLab and I have both had plenty of grief from sub-par connectors and cabling. IDC connectors don't connect to stacking headers well, so watch out for that.