Rear Spoiler

anybody running a roof spoiler on their Early Econoline? I've seen them on a few, but not sure where. Got any ideas what spoiler if any is the right width?

Thanks
Rob

i happen to have horizontal stabilizers off a bell 206 B helicopter which would make a crazy looking spoiler. they are super light weight and have cool looking rivets on the skin surface. you would need to use two of them to make the thing wide enough but they could be canted where they join to give a slight dihedral to the spoiler. we did a big hangar clean up and i bagged four of them.