Kumi Hitsuboku and Aiko Kikyuune have very good banks for both languages, so I'd definitely recommend them! Idk if you've done this yet, but searching under the
Japanese and
English tags on UTAU Wiki 2.0 might also help.
I'd mention my own, but I've been told her English VB is hard to understand
I remember your original with Noke, and it was really cool, so I wish you the best of luck with this song!