Probably any good trim shop could remove the dents, I myself had a few done at MCB, they came out well and the price was reasonable. The argent paint that was used doesn't really match the original, mainly the texture, but that's because the ingredients for the original formula are scarce and any remaining paint is expensive these days. The common argent paints in use today just aren't made the same way. One thing you could do is have the panel restored and then paint it yourself using some of Frank Badalson's paint if you want a more authentic appearance.

http://www.tuffwheelrestoration.com/metal.html