Oh.. that sucks. I'm sorry it didn't work out.
I can recommend a good conda breeder if you like.. he's a great guy to work with, I've gotten two snakes from him. He doesn't have any yellows right now but shoot him and e-mail and he can tell you if he's expecting any babies soon.
http://www.jeffhartwig.com/Animals%20for%20sale.htm
Otherwise.. check out kingsnake.com. There are usually several yellow anaconda ads there all the time.