Conversion of revit RFA files to other format without revit

Does anybody know a way of converting Revit RFA files to another format without Revit?. I have a link to some excellent models for copper compression and capillary fittings from Pegler/Yorkshire but do not have any means of converting them, I have downloaded the trial version of Revit 2017 but the save and export appear to be disabled in the trial. The libraries in other formats would be ideal here on Grabcad as they are full libraries.