Finding parts for a cladded AV is always a hard thing since they haven't been made since 2006 and less of them were made compared to a WBH AV. The aftermarket companies quit making parts since the demand was very low so junkyards and maybe GM are about the only source for cladded parts now.
Probably the easiest thing for you to do is to paint the grille and powerbar you have now......
Painting it would be the easiest and cheapest. I believe the front grill just pulls off straight forward... Might be a few bolts/screws under the hood in the front, but otherwise it just pulls off. Be careful, because the clips are probably fragile