Glenn, we are doing the same overrides to the SF native header and have the same use case. Did you ever figure this out? I actually was able to pull in the SF CSS and was successful at showing the native search Div/ CSS and button on our pages, but the trick now is the Skuid pages can’t access the native sf js. I used the console to try to identify the native js, but could not pinpoint it. Is there a easier way?