You should be able to get a long metric bolts at a fastener store or parts store.
IF you really get stuck I got a couple assemblies here,so If you tell me how LONG it is I may be able to match it up and send it to ya for shipping.

 

Was going to warn you about the tensioner bolt, bet you forgot to loosen it like everyone does the first time they monkey around in there.

 

No i did loosen it... It was when i was re-tightening it that i broke... but its all fixed =]