Well, unfortunately my Local Ford dealer seems to have hit a dead end, much like our UK brethren have with their Ford dealers. Here was the response I received today:
"So I just got done talking with our body shop and they don't have an actual paint code for the colored wheels, just like parts. They are forced to go through some outside company and color match the paint.
They thought there might be a paint code on those specific wheels but there isn't.
I'm not sure sure how you would go about getting an exact paint code for those wheel now."
In my area we have a pretty good wheel shop so I suppose the best option would be to just take the stock rim down there and have them try to do a color match.