Most of those hoods/covers are just a heavy vinyl material real similar to semi/truck traps. They make a glue/adhesive for repairing those tarps. You just have to have a piece of material to make your patch out of. You just clean the tarp up with some rubbing alcohol and then apply the glue around the hole then put your patch over the hole.
Most truck stops have small cans of the glue. Here is a larger can but you can find the same brand in smaller amounts.