Hi Brenda,
I’ll make sure this is filed… in the meantime. I just made this macro which you can add to Options>Aliases to do this now.
_DupFaceBorder ExtrudeCrv S=Yes L=Yes
I called it EF as that was pretty quick to type. Just pre-select a sub object face or surface with Ctrl+Shift and then run the alias. It will make an Extrusion if possible.