Donna - I've been having great difficulty as well finding the 7% - did the same. Called around everywhere and no one had it. I was also told that they could not even order it from their wholesaler until late Feb and even then there was no definite delivery date. One particular Walgreens told me that they had not been been to get it for months. I persisted and miraculously they finally found some (in the back of a closet?) .
I live in Northern California but it sounds like this is happening elsewhere as well. It is quite exhausting trying to find this and also figuring out how to get Medicare to cover it.
I actually called Nephron, one of the generic manufacturers and they admitted to a shortage on their end a few months ago which has been resolved. so who knows what's causing the supply chain problem.
Mary