I just got a quote on my 46 grill from custom chrome plating in Grafton Ohio.. At first they said $1500 - $2000 depending on condition. I shipped it ($90) to get an accurate quote and they quoted $2500 for their mid-grade chrome.. It was in good shape. No dents just rust on the sides of the bars, but the surface of the bars was fine. When I called them the sales guy said they could not repair the pitting on the sides and plate over the pits for $1400. I hope they ship it back in good shape ($90 again). Lesson learned, get in your car and go there..
By the way, I was cautioned about using Superior in Houston; however, I have no personal knowledge..