I literally just discovered the solution to my issue of not being able to completely meet the RDA of 4700mg for potassium. And it's such a simple and cheap solution that I feel dumb for not thinking of it earlier.
I didn't come up with it on my own however, so I will need to give credit to Martina and her KetoDiet Blog post entitled, "Keto-flu" and Sufficient Intake of Electrolytes". Her suggestion of using lite salt to increase potassium consumption is exactly the kind of solution I've been looking for!
Lite salt contains potassium chloride and 1/4 of a teaspoon contains 350mg of potassium! I plan to buy some Morton Lite Salt tomorrow. It also has some iodine, so that's an added plus for me since I also need more iodine in my diet.
Morton Lite Salt costs about $6 for 11oz, so it's super cheap. You can get it on Amazon here: Morton Salt Lite Salt, Less Sodium, 11 oz.
I'm so happy I finally found this stuff! Hopefully, it will help anyone else who is lacking potassium in their low carb diet as well.