[Zana]

Lane Bryant bras are great for larger sizes, and they're having an excellent sale right now (buy two, get two free). Priced as marked they're not inexpensive, but they always seem to be having a sale or coupon and there's often good stuff in the clearance section. There are several different molded styles that will work for dance bras depending on what you're using them for: I like the microfiber balconette, full-coverage and convertible ones. Lots of colors, too, in case you need to match something and can get away without covering the whole bra in fashion fabric.