I visited "King George" and his bottling company in June of 2004 since then I have received newsletters (for lack of better term) and a Christmas card so I think they are still in business. He is a great guy but if you visit make sure to schedule a bunch of time as he will talk your ear off.
Any way at the time he still had Polka Cola available along with his own flavors still bottle in returnable 6 ounce bottles. Some from the 1950's or earlier. Also he bottles sundrop in 12 and 16 ounce returnables.
I plan to visit him again in early April so I can let you know at that time.
Collector of soda cans - Most wanted can Goody Root Beer