I had a set of the no-drill clip on flaps, front and rear on the '71. The flaps came off when the car was trailered out to me from Nevada (they used the straps that hold down over the tires). The clips are still there though so I could still try to fit new ones.
It depends on how/when it gets driven in that someday day when its done. If I don't think I'll be driving it much where there's loose crap on the roads, I won't put them on. If I do end up driving a bit then I probably will.
Those Jaeger units look like a good possibility.