Your G originally used the early AC persian orange. There are two different "persian oranges" that were used by AC. The early one is commonly called "persian orange #1" and the later version is commonly referred to as "persian orange #2". I say commonly because I have not seen any distinction between the two on any actual paint label. The early one is a "pumpkin" shade of orange as opposed to the later one which has more red in it. The early one was used by AC up until about 1960, I think. For a visual comparison of the two (in PPG automotive paint) relative to my '42 B original paint, see the link.
As far as I know, most (if not all) of the paint you get from dealers will be the later version with the reddish tint to it. Some have used a rattle can spray paint from Krylon that is said to be close to the early orange but I have not tried it.