Twenty years, ago, ribbon cable for C-band installations was common. Since at that time, it was very expensive in the direct burial form, a lot of it was installed in pvc water pipe or black flexible polyethylene irrigation water pipe. It was before the days of grey PVC plastic conduit.
While most dealers used ribbon cable, I used separate coax and control wires. Ribbon cable was hard to pull in any pipe smaller than 1-1/2 inches. Using separate cables, I could use the much smaller one inch stuff and pull with ease.
Fore control wiring, I used the four conductor parallel color coded #16 or 14 cable sold at auto or trailer supply houses for wiring boat and utility trailers. It is availible in spools of up to 250 feet in four to six conductors.