I need the carriage bolts replaced on my engine and want to know the price on 1998 Mazda Protege

I have a busted carriage bolt to the engine and need to get it repaired. How much does it cost to fix this at a shop.

Asked by for the 1998 Mazda Protege
If the bolt is specific to Mazda the bolt of correct length thread and hardness grade will be only available at the dealer.Is it an engine mount bolt?