Intake manifold bolts?

I'm looking for intake manifold bolts, but currently I'm only finding that they have been discontinued and cannot locate them anywhere else. They are for the intake manifold which has eight different bolts which are apparently torqued to yield which you're not supposed to reuse which I was not aware of at the time. Unfortunately, as I went to torque them one snapped in the block, so now only have seven out of eight that were previously used on the vehicle. I'm trying to figure out if there is a place where I can purchase them or if another bolt would work. The car has been down too long and isn't only transportation, I have for me and the girlfriend to get to work and to get the kid to school. any help would be awesome, thanks.