Foods sources of potassium include:
Dried fruits: raisins, prunes, apricots, dates
Fresh fruits: bananas, strawberries, watermelon, cantaloupe, oranges
Fresh vegetables: beets, greens, spinach, peas, tomatoes, mushrooms
Dried vegetables: beans, peas
Fresh meats: turkey, fish, beef
Fresh juices: orange, grapefruit
Canned juices: grapefruit, prune, apricot
Other foods that have some potassium include Cocoa (

The potassium and magnesium in Cocoa are my excuse for eating Brownies)
The Daily Recommended value from food is 3,500 milligrams.
[url]http://www.mayoclinic.com/invoke.cfm?id=SA00100[/url]
I know Potassium over-the-counter suppliments are sold by just about every vitimen suppliment brand.
CVS, Walgreens, Walmart, and K-mart sell Nature Made and Sundown brands..both of which make potassium suppliments.