Hey DougZ. I have a few pics of some alternatives forum members have built for *covering*, but still utilizing a configuration similar to the original lighting/vent placement. I'm attaching them here. The first one is from member Sneakinup, the second from Trevisgardne and I don't have the name of the member for the last. Hope it give you some ideas...
By the way, I found these by going to the Gallery and then using the Search function for lights, ceiling lights, overhead lights, etc.