I added a picture of what I am looking for to the post (Edit/Find). I think FindInFilesRegex corresponds more or less to Use wildcards on this screen.

Also %RCOPY preserves date modified of the original routine, and I'd rather preserve it. So far other listed approaches do not preserve it.

Yes, that works and assigns the time of copy as the date modified. Thanks, Stephen! BTW, in my experience at least some old-fashioned commands are faster than their modern equivalents though in this case the speed is not an issue.