Can anyone out there help me. I took bolt out of the idler pulley and the tensioner pulley the ones that hold the pulleys on and sent them to the chrome shop. They messed them up and are not useable. The bolt for idler pulley i think i can find one that will work but the one for the tentioner is a special one with flat spots on it, was told it was self tapping. Does anyone know where i can call to order these,or maybe someone has some? The Chevy dealer says the only way to get them is order the whole assembly.