At most it is probably satin, I havent seen a high gloss one yet, that hadn't been repainted. Some Chevy colors that have been suggested are (kind of close) - Willow green or Laurel green. Havent seen one in person yet.
under "Paint-Decals-Parts-Medallions for Sale"
look for "Wizard Green 1946-59"
It's around $19.95(Canadian) a can.
I don't know where to get a true wizard gold. They seem to have changed the color slightly through the years and no two seem to be quite the same. I've purchased many different shades of gold in rattle cans, but haven't hit it right yet. Some have had luck with a custom color match from auto paint suppliers.