Andy,
Some "chrome hole plugs" might be your temporary answer. You can buy them in different sizes on-line or at your local hardware or home-improvement store. My buddy bought some at Lowe's and they suit him just fine.
As far as re-chroming... you might be best to investigate local plating companies. This said, unless your bumpers are perfect, rechromed over-riders might be over-kill. If yours aren't attractive, you might want to hold out for a decent set on ebay.
Kevin