I'm trying to find out which ones of these are even still made, and it seems like Canada Dry Potomac does more than anyone, but I found more from RC Winchester territory, bottled by CD Potomac.

I found 12 packs of Tangerine, Red Raspberry, and White Grape (no surprise)
In Hagerstown however at Giant Eagle, I found 6 pack PET bottles of Diet Rite Golden Peach. First time I've seen that flavor ever. I've seen Strawberry Kiwi over in ABC territory recently, and wondering what other flavors are out there?

They revamped the whole line a few years ago, taking out some flavors, adding some new ones, and reformulating the rest. There once was a chocolate flavor!

There are currently seven flavors:

Cola
Tangerine
Red Raspberry
Golden Peach
Black Cherry
Kiwi Strawberry
White Grape

I know that Potomac does 5-6 of them. Cro-Pac (aka Polar) also does them for the 4th tiers. Davis buys 12pks from RC Winchester, and produces their own 2L.

The only one I've never seen in this area somewhere is Black Cherry.