I ended up getting in on the last RCI group buy right before the holidays because mine never came with any shields. Since I live in MA and there was a lot of rust to deal with, I assume the originals rusted off, or were removed because they were in such tough shape they might have made the underside look even worse. The RCI plates I bought are seriously nice quality, and lighter than most aftermarket ones because I opted for the powder coated aluminum version. I got the front that protects the engine area, as well as the bumper filler plate so it’s a contiguous plate right from the bumper all the way under the engine. I don’t do a lot of off road at this point, but it’s nice to know it has some serious plates should I ever need/want to. I researched this for a long time, and unless you find a deal from a southern state with no salt use on a set of factory ones, the rest are overpriced junk, which is why I ultimately opted for aftermarket “real” skids. As for the hardware, my aftermarket plates used the factory attachment points, and I did have to drill out one of the bolts and retap the hole because someone had previously sheared off a bolt, as well as chasing the other holes with the tap because the threads had a lot of rust in them. I coated the new hardware in anti-seize so I won’t have that issue in the future. In your case, I’d start now soaking the bolts with PB Blaster every few days so hopefully they’ll break free when your ready to take them out. You could also hit them with a torch when you’re about to remove them, as heat helps a lot. Good luck!