Does someone make these for C5 Vettes? Make sure I have the right term here, I'm looking to hit button on my remote and the windows go up or down?

Yes it made for the vette. I have seen them on ebay and in many mail order catalogs.

Yes it made for the vette. I have seen them on ebay and in many mail order catalogs.

Does it replace your stock FOB/Remote? Or are you carrying around another remote?

You plug the valet into the OBD2 port under the dash. It allows you to use your Fob.I think you hit the door lock button 3 times for the windows.