Best cable elevators for pc and speaker cables?

I would suggest that you make some elevators out of whatever comes to hand (coffee cups, toilet paper cores, chopsticks held together by rubber bands, whatever) and then listen. I have mine up on some homemate elevators but really doubt that I could hear any difference in an A/B test. Yeah I know, I need BETTER (i.e., more costly) ones :-)

Toilet paper inner cardboard tube. Upgrade is paper towel inner carboard tube.
Cut, paint.
No problem.
If you have to spend money to impress your friends.. Plenty of ways to do so.

Use the tee pee method for speaker cables and Styrofoam from packing material for IC's and PC's. You can cut and shape the Styrofoam to your desired specs. Leave them white or paint to match your decor. Simple and effective.