front license plate mount options for v

no dimples or plate location as indicated on some other/earlier prius models. i've seen a few front plates that look like they are held by tapping screw into a hole drilled in the bumper, e.g., (can't tell with the plate in the way if any insert was used). might have to break down and drill for that or?

I've seen a couple folks make mounts off the tow hooks under the covers on either side in the bumper, e.g. ,but pretty rudimentary. then there are some pricey ready mades. It looks to me like a full thread metric bolt could do the trick for a tighter self made style although not having good system to secure a plate mount on a single bolt means it could get loose and go postal on the bumper i'm trying not to mess up

one other notion is just to bolt or screw to the covers for the tow points themselves. don't know how well they snap in ause never had one off. I could get a spare cover and bolt directly to that - would take a couple more close spaced holes in plate.

probably our state is never going to give up on the front plate so i shouldn't regret a couple holes in the bumper and just get on with it. so maybe back to the notion of just a couple discrete holes and maybe a luv tap frame. I've got some decent pitch stainless truss head k-lath screws that would only need a small hole and would hold pretty well in the bumper material although i'm not sure the depth of that bumper thumper and whether the 1 and 1/4" will be long enough. and then I guess I just have to do your best to center the thing without any locating marks.

any ideas, implementations or results appreciated. not the most major decision i'll make on this but I can see it has confounded folks in the past.