Originally Posted by David A Ramsey
If what you've pictured is acceptable to you, then I would look for a plastic tube with an ID that fit the OD of the wire; minimum slop. Then I would slit the plastic tube, nice and straight, with a razor blade and force the wire into the lengths of plastic tube required for gluing in place. I would cover the slit in the tube with a thin strip of magic tape to prevent glue from entering the slit.
I don't actually have that unit, but have found it for sale online. There are no specs telling me the wire diameter, etc. And before I plop down $15 for the part with shipping, I was hoping to find something suitable that wasn't so expensive.
Still hoping folks can recommend some alternatives!