Metal Barn ridge vent question........

I have a customer who has a metal pole barn, FBI or Morton....but it has a clear ridge vent that runs 40' to allow light in. The hail busted holes in it and this guy is damn determined to have it replaced. Where can I find something like that??

Morton or FBI say they dont have it, so I think it was an aftermarket put on by Jack A Leg.

Thanks for any help!>>>