I have the same problems, all those online sites for us busty gals want 100's of dollars for one bra! but stores don't really carry the bigger sizes. I'd love to buy those cute and pretty ones, or better yet be able to go without. I'm envious of those who can wear what they want.
I haven't found a sports bra yet that doesn't make my neck hurt. Don't know why my neck hurts but I do like the way it keeps it up tight without those annoying under wires.