I had to run 6 speaker cables, a cable tv coaxial line, and a network cable on the surface of a wall in the garage as there was no way to conceal it inside that particular wall. All 8 cables were roughly the same size so I made a wall mounting clip to keep the wires nice straight and organized. I could have purchased big wire concealers or made a box/duct to conceal the wires but I figured in the garage this is an acceptable more industrial look anyway.
The holes that hold the cables are 7mm and that worked for my coax cable, ethernet cable, and 14AWG 2-wire, in-wall rated speaker wire. If your wires are a bit different in size you may be able to scale it slightly. If they are way different I may be able to find time to resize them for you if you send me a message and I can post it.