Do you mean these things?
They've been discussed here before, you can get them on ebay, some are suspicious of how it seals in air/water, possible tarnish to the paint where it touches the body and issues with raising the bootlid and an option where you can keep the original side windows.
Be sure to research it as much as you can, feedback from those who have them would be good.
https://www.youtube.com/watch?v=dzxtlccqdtgs
