I just thought I'd let you guys know about this website I found because it's ended a great deal of stress for me. Not sure if this is the right section, and I'm not paid to spruik it, but I had to let you know:
My bra size was a 10E before I fell pregnant and the first thing that happened was my boobs became bigger, about the same size as before my breast reduction (yes, 10E was as small as they could get them). So I am now a 12F.
DJs offered one, absolutely hideous, lace monstrosity and said it was the only brand that would fit me (who the hell makes maternity bras only up to a DD?). They then charged $70 for it.
The above website has Berlei etc. Just got a plain black and a plain white bra in my size for $39.95 each (which is a miracle at my size). Shipped on the day I ordered and delivered soon after.