is it possible to pass the jpg to an external tool

Hi,
i have a tool that is much better at touching up jpgs rather than doing the full RAW conversion.
So for the SOOC Keepers, I sometimes like to pass on the jpg. While you can do open in finder and right click tool, it would be nicer if the external tool gets passed the jpg than the raw file which is what FRV does.
Is there a possibility to pass on the jpg by adding some tag to the external tool line?
Thanks,
Alex