I built two of them and we only use one so I could sell one cover. They were expensive to build so you might not want to hear the price but if you're interested shoot me a PM.

Here is a link to a video showing the cover in operation during a dyno pull. Once the engine hits 6000 rpm the cover fills up with oil.
https://www.youtube.com/watch?v=8oLyIhDdKww