im not sure where you would find maternity size 8. if you are wanting normal ones BNT definitely does do size 8. i have to buy all my bras there as they are the only ones that fit me. if you want to go to the logan hyperdome, ask for erica to fit you. i used to work there and she is sooooo nice and has been working there for years so knows her stuff.
you might also find that if you are a size 10c then when you go down to an 8 you will be an 8D.
if you need any other help let me know.