Somebody called ktto has recently made a custom PBR mod for the CS757. https://757.razboth.com/?fbclid=IwAR2Od6klFkGiSwVrx612hXE-ytZzbaACeQ-_WPjIvLnkb8AeW1rJgPAP10Q
It has transformed the look of this plane and, more importantly, it works retrospectively with all existing liveries.
I wonder if this would be possible for other non-PBR aircraft in P3D such as the TFDI717, Feelthere E135/145 etc? It's something I would be willing to pay for if the price was reasonable.