It would be a fun project. I built mine off a Verucci 50/Highway frame, and really enjoy the stripped frame deal. It's so easy to work on. I actually still have the body.
I'm also considering putting my ZX engine on it, and building another 70cc Corsa kit to sell in the zx frame.
Take your time, and see what shows up. Maybe a junker of of Craigs List... Lot's of spares that way.