Rob, you might add some pics or a bit more description. Are you talking about the crossbar center pin support extending bar the stands vertically, or the slider assembly mechanism under the roof rail? I haven't seen any stainless support items in our electric top...but have had issues with the lubrication and washer assembly's in the roof sliders....
Pac NW and warmer places
1995 E250 EB 5.8 2WD on to a new owner
2006 E350 EB Elect Top 2WD