No idea on the RV/van cables...but I can say that I had to both fabricate a spacer for the throttle pedal on my '90 pickup AND add a bunch of tiny zip ties to the pedal end of the cable to make it work right.
It's one of the aftermarket parts store cables, though I don't remember exactly which one now...I went through about 6 different cables trying to find one that wouldn't melt in a day from turbo heat (finally ended up shoving this one through a spark plug insulator wrap/boot that has the appearance of a metallic blanket on the outside), and it's been holding for quite some time without any hints of an issue.
But my spacer + zip ties have probably taken up 2-3 inches worth of excess inner cable.