Aloha pookie,
i haven't tried the cherry juice concentrate, but i've tried the cranberry. I am no authority, but I think (for me) it's going to take a combo of things--so i'm trying a gluten free, soy free, dairy free, egg free diet and i'm not sure how much the juice has contributed to my relief.
I get my unsweetened cranberry juice (and i've seen the cherry their) at an organic health food store. I had to call around and search all over for an unsweetened concentrate (costco doesn't carry it

). I buy (the brand)knudsen's 32 fl oz bottle. So my suggestion is locate an organic health food store.
I don't know how unsweetened cherry juice tastes (i choose no sugar so I don't tax my liver anymore than I have to, leaving it in the best shape to filter out toxins), but cranberry straight up is less than tasty, so I usually put it in my smoothies--which includes blue berries, strawberries, and bananas, but no citrus since I seem to be one of those ra people whose joints don't like citrus

.
The following is a link to knudsen's webpage:
Knudsenjuices.Com
click on where to buy and enter your zip code for the closest store. If it doesn't come up with a store near you, it doesn't mean it's not stocked at a local market--the site doesn't have all the stores names at which its products are sold.
Good luck! And let me know how it works for you (i might try it to). I'll see what I can find out about it and i'll post any info I find. :d
marlakate