Best bet to get Missing Link parts is through their eBay store, Missing Link All of their hubcaps were featured in the last Model Cars mag. Fireball modelworks has some gorgeous mopar hubcaps, but they are late 60s.
One thing I noticed between the Retro Deluxe and USA-1 version. It looks like the Retro Deluxe was run througn the molds as they were left by the previous owners. The USA -1 appears to be cleaned up, the body is sharp, crisp, flash free and parting lines are barely visible.
It is a Base-clear system. Paint goes on semi-gloss and requires a clear topcoat. Dries fast and hard like a lacquer. Everything is pre-mixed ready to spray, no thinning needed. Their 2k clearcoat does require you to mix the activator before you spray, once you mixed the clear you can't leave it or it will harden in the jar. Shipping is very fast. Btw, they will custom mix a color for you if you don't see it. I just received a custom order last night.
The new site is great. I like the new process for ordering replacement parts. Take a picture of your receipt and UPC code and upload, list the parts required and done. I received replacement parts within a couple days and that was shipping to Canada.