it would be less convenient, but is it available in solution for a nebulizer? that would be one option to stay on it. Also you might try doing a search for a combo drug, like Advair, that still contains it. But alas that would still require a new rx.
If you're just looking for a long term brocodialator, Spirva works for me. I also take Advair and use a ProventilHFA (albuterol) as needed.