hey sweetie, i did costume design for blood brothers last year..... theres seriously not much resource wise and it has to come from complete and utter your own imagination and knowledge of the musical. There was two of us that did it in my class and our pieces came out compltely different! So im really sorry to say this but all uve got really to work off is the text, ESP seeing as most of the costumes used in the actual musical are just like jeans and a teeshirt kinda thing. but good luck... costume design is fun.