Sorry I don't have any solution for you - I just wanted to say that I empathize. Tetley is a 5 am riser and that's just a wee bit too early for me too!
Luckily I have a terrific husband who takes it upon himself to haul Tetley off to the living room at this time where he continues his sleep on the couch while Tetley can play on the floor and I can get my sleep.
I'm hoping that as he gets older he'll sleep longer. How old is Bella?