Where are the higher telescopic masts?

I am looking to go taller with my portable mast. Currently I own a great mast from here, and being 21 feet (6.4 meters) high, I am looking to grab an additional 10 to 20 feet (3 to 6.1 meters). I am not having much luck finding anyone that sells taller telescopic aluminum masts, and it seems there is nothing between this size and going all out with a larger tower, of which I have no room for. Ideally I would like to have at least 30 feet (9.1 meters). Does anyone know of a retailer or distributor that supplies such a mast? The requirements are the aforementioned height, lightweight, telescopic, and not necessarily portable, but somewhat manageable to stow away when not in use.