Terrific stuff here gals!
Have only read (so far) to page 4 here so I don't know if anyone mentioned this site yet:
http://braexperience.com/
I just googled 'bras large' and found it. But they do have bras of all sizes.
My problem is a somewhat unusual size. This site offers boo-koo bras by SIZE and a good search vehicle it seems after you click on a size. I'm bookmarking this one!
In the past few years I've ordered some fairly good larger size bras from Penny's, Glamorize brand.
Yup, I agree with the others who have stated that most of us have worn bras with too large a band size and too small a cup size. Changing that mistake helped me out a lot in the comfort department, decreasing the riding up back and even front at times.