How can I install the case drive bay cover over the cd-rom?

I've been trying to find a way to somehow put the original drive bay covers that came with the case over the cd-rom and the card reader. I like the idea of having the cd-rom hidden, and also the case looks a lot better since the material on the covers match with the rest of it. Does anyone have any suggestions? I've seen cases with the bay cover flaps on a little spring which open and close with the CD-rom. I think they usually have a little hole with a button that connects to the cd-rom eject button. It doesn't actually need to be that fancy, it could just be some kind of latch with a little magnet to hold it close. Anyway, I think I could put something together, but I just don't have any clue where to start as far as the parts and building ideas. I would really appreciate any kind of help. Thanks.

That would totally depend on your case. Higher end cases have it.