Is it possible to pattern or mirror a sheet metal part within a part file that has other bodies (such as structural members) modeled in it?

Right now, to do so I'll create 3 new base flanges that will be exactly as the one I want to pattern, together with the bore hole...

Even though this is a simple project, I decided to model the whole structure in a part file because I'm using Weldments features and need the cut-lists afterwards, instead of modeling several parts in different part files and then create sub-assemblies and assemblies.

Looking forward for somebody's help.

Thanks,

David