Nearly 5 months after the con I needed it for, I found it!!!
I found my white strapless Lane Bryant Bra!!
(The one I needed for Shiina, and tore the house apart for)
It was not where it was supposed to be >:(
It was in a bag of fabric scraps from the Gogo costume. Seriously. It was a VERY full bag, filled with Gogo scraps.. and my bra.
But Now I have the right bra for this costume!! I'm so happy I found this fucking thing XD I was sooo pissed that I couldn't find it in time for the con last time around. But now I have it.