well for the cut idea... simply cut out the section around fog lights, then cut and section the rest of the bumper and weld it in and just section out as much as ya need to reinsert the fog light section.... not to bad really! hell you could probably plan around it to do it in one cut.
but another thing to think of is remember the lower bracket holds the grill so youll also have to do some custom brackets or somthing.
you can always buy my extra painted bumper with tear drop fogs to experiment with or just slap it inplace of yours while you customize it. 50bucks
tho to rock the valance that might take some work..... but its doable still! youll need something like to fix plastic bumpers. it like melts the plastic back together and then you can just sand it smooth enough and paint it a flat black or what not. so it is doable! if you wanna experiment with a valance i got one with tow hooks you can have free.
just remember its a plastic valance.... we drag the hell outta them and nobody looks twice if its chewed on alittle
so dont get to OCD on that sucker!