How to save to .rtf

There is an extension to copy to clipboard as .rtf but I need to create a .rtf file for a particular regular job – writing scripts that are imported from .rtf on a teleprompter. I used to use plain text but it is really helpful to include a bit of formatting to indicate changes of tone, quotations etc.

Is there a way – or an action I haven’t found yet – that will allow me to save to or export to .rtf?