Our JFBCContent plugin still likely won't work in your component as it's specifically tailored to work only in Joomla content or K2 content areas.
However, you can either use the JFBCComments module to add it to those pages or the {JFBCComments} tag to add the comments box to your component's template files or content areas.
For more information about the {JFBCComments} tag, see:
www.sourcecoast.com/jfbconnect/docs/conf...ocial-content-plugin
Hope that helps,
Alex