Someone makes covers for Jesel belt drives for SBC that run in dirt track cars and mud bog trucks. Can't remember who, but I don't think that it is Jesel. (could be wrong though) Not sure if they are made for anything else. They are two piece, (upper and lower) made out of thin sheet metal and just bolt over top of Jesel unit, not really tight to the balancer hub. I actually just took one off of an old NASCAR engine that was converted to a drag race engine, and give it back to the customer.

Brian