There are type 1 bodybuilders who are members on the forum so hopefully someone may post soon. Take a look at the following site that offers advice to insulin dependant diabetics:
6 years ago i used to do it to a degree, but at that time i was on old pork insulin, around 1530hrs the long acting would take dip, at this time i would have a 2 hour work out (4 times a week) this then also lowered my sugars and i was then able to have a good tea, though protien heavy and would use high protien drinks, sugers used to be fine.
Soz - just seen your post - not sure if you're still interested lol! I'm a bodybuilder with type 1 diabetes hoping to compete in April. I'd be happy to help if I can - feel free to email me at [email address removed]