I've been looking for a '65 Cobb (7) plate myself. When I lived in Dekalb (2) it was very easy with hundreds to chose from which I found two tags with some great numbers.
TagDr.com and GeorgiaPlates.com as well as eBay are where I'm primarily searching. A quick check to those and I found your '63 Cherokee on eBay.
https://www.ebay.com/itm/Vintage-196...-127632-2357-0