Multismith

I will likely be fabricating my own rock rails if what I'm looking for isn't already available to market. I want a slider that is sort of like the sahara OEM plastic but metal of course. Basically 3" flat top with a 1/2 gap from tub that fasten to frame rail via bolt or weld. I don't know of any manufactures that have this without having tub cladding or sorts and crush bolt system. Tub cladding frightens me mostly for reason corrosion from salt and moisture. Please share thoughts and experiences with rock sliders with tub cladding in areas of high humidity \ moistures \ Snow \ Salt etc... Same might go for the AEV 1/8 corning cladding as well. Share pics if you have something like a describe above and or any manufactures that may be a candidate... I have researched and wanted to be sure I didn't miss anything. Thanks in advance