They're not technically nursing bras -- they're wireless junior's bras -- but you can use them as nursing bras!

http://www.target.com/p/xhilaration-juniors-perfect-lace-bralette-assorted-colors/-/A-14294723#prodSlot=medium_1_1&term=

One nude and one black in size M. They were too small for me so they would probably fit someone a 34B and under. Super comfy and cute!