IniBuilds, a developer who stays behind especially freeware add-ons/liveries for X-Plane 11 and Prepar3D, has recently announced that they are working on A300-600R.
The developer shared an in-game preview of this aircraft on their Facebook page, you can also see this screenshot as their background photography on their Facebook page. The screenshot is obviously from X-Plane 11 and shows off the model of the aircraft with its visual effects.
There is no more information about this aircraft shared yet. If you want to see more, visit the IniBuilds Facebook page.