Have either of you, by any chance, tried your local health food store? The lithium I bought at mine is lithium aspartate, made by Solaray. It takes less than the prescribed kind, and doesn't has as much toxicity. It works unbelievably well for my husband. I honestly don't know what we would have done if I hadn't found it. His mania was really getting out of control - he wanted to beat people up. He doesn't want to go to a psychiatrist, and I don't blame him. Lithium orotate is another low level one, which is available without a prescription.
He takes two to three capsules a day and it really works!