Nursing bras/tanks for big busted- not plus sized

I've always had a difficult time finding bras that fit.  Pre-pregnancy I was a 34DDD.  I've always had to shop at specialty stores for bras that are supportive and fit comfortably.  Now I'm a 36I.  Trying to find a good nursing bra has been a nightmare!!!  I ordered one from Bravado that fits okay.  Although halfway through the day I just feel like I have a floppy una-boob.  Tonight I did some research and ordered another bra and nursing tank from HotMilk.  Anyone else have this issue?  Do you know of any other places to purchase supportive, comfortable nursing bras/tanks?