I got 20' of 10 wire ribbon today. I'm hoping to try it during my days off. I'll post my results.
The plan is to twist the ribbon into a tube shape and put woven sleeving over it. I'm hoping this will provide some EMI rejection. I will also try ferrite beads if that does not work. I'll also route it away from all other wires as much as possible. I do print from SD right now, so that is a worry.
I just got 2 Pi Zero Ws to run Octoprint so then it won't be as important.