Preliminary "Little Shop" Planning

I've been collecting images to help me design my "Little Shop of Horrors" Costumes. I'm doing this SO prematurely, but I don't care! I get excited! Anyway, I'm researching old girl groups of the 60's to design the costumes for the doo-wop girls. They will be my favorites, I think. Though I was told we could buy a lot of the costumes, I'm sure I will be ambitious and actually make a lot of them.