Well Samuel French has a lot of scripts (they usually cost around $6-$8. Also, there's a website called simplyscripts.com that has alot of musicals (unfortunately in this case, they don;t have Wild Party)
maybe stageplays.com ... you can normally find out of print plays there
"It's really crazy backstage. Just before the show started, Elaine Stritch got into a fight with stage hand, and then inexplicably started squeezing Hugh Jackman's buttocks. And by the time they had sedated her, she had punched out two cops and was holding Norbert Leo Butz hostage, threatening to kill one of his three names." -Nathan Lane