Perhaps you can use Harazoki Yuki.... :3
http://www.utau.wikia.com/wiki/Harazoki_Yuki
Shes all in English, but her voice sounds a little with the Japanese pronunciation.
I am now working on her act 3.0, which will be an added english library. I honestly think you should use UTAU instead of Vocaloid, because I own Vocaloud and it gets very confusing...
If you feel interesting in downloading Yuki, I put a password on her, but you can private message me or email me for it.
Soooooooo.... :3