Mike, I had an outfit rechrome a slightly corroded bathroom light fixture a few years ago. I don't see them near the same locale around the Grand Ave. industrial area now, and am not sure of the name - East Side Plating sounds familiar, not sure. But if you Google "plating Portland Oregon, you'll get plenty of options, any one of which could likely refinish your medallions.
I would run a similar search for your area, Rick, especially for automotive-capable platers, and see if one has the familiarity with your panels and the equipment big enough to handle them. There may be something in Butte or Missoula. Or if you can plan a trip to Portland, or opt to ship the damaged panels, contact and question some of our outfits about repairing/plating them and schedule one for the job.
-Joel