Well, I don't like to think of myself as old, but I just prefer the sound of "rock opera" to "sung-through".
The music is largely written (we're working on a couple new pieces, to help plug a few story gaps). Ideally, we'd like to work with a vocalist/lyricist who could listen to the melodies we've roughed out, and then turn around with something someone would really sing. And, as apart from a little narration early in Act I to fill in some back story, the lyrics need to tell the story.
I thought that the term 'Rock Opera' had been left in the past; something for us older ones to fondly remember lol(but maybe I'm just out of the loop)... either way, its very cool to see that it is still carried on...
Looks like you're after a vocalist/musician/composer mostly ...can't help you with that... but if you want lyrics let me know; I'm good with lyrics and like to write them... depending on your story, which I'd like to know first, I might like to do some collaborating.
(btw I live in Barrie, and I'm not a pro but I am a member of SOCAN)