It is bonkers how complicated they managd to make simple items. I think they just set out to re-invent the wheel instead of just making a round wheel, rounder. I got some cheap Moon Unit cable hangers but i draw the line there as they aren't that great, either.
Top tip if you buy the latter 2nd hand is too ask for a pic of the area where the cable is clamped. If it is shiny and mauled, from cable slip, do not purchase. Also; replace or flip the washers that clamp the cable as they bend and you lose clamping force. Early Moon Units clamped cables in a different way and was probably alot better.