Found a skirt at Target. It was actually in the girls section, with the school uniform stuff, a size 18 or 20. I was sure it wouldn't fit, but I decided to give it a go and try it on anyway. Success! The only issue with it now is that it's polyester, which is apparently a bitch to dye. But yay for theater people,
lonelyflutterby is ask a costuming person she knows for any tips. I also found a sweater vest and a tie which are having striped painted on this afternoon.