I want to get some rear window louvers for my '83 L-type (no wing/sunshade) and I have heard mention of both plastic and metal louvers, I think I would prefer metal but I'm not sure. What I'm wondering is how many different styles and brands of louvers are there? Were there ever actually Toyota made optional louvers? And lastly would I be better off finding a hatch with louvers already on it so I wont have to drill holes or anything? Thanks for any input.