I have a bit that could be what your looking for. No idea where it came from but it’s not off my series. 😳
Big lump of U channel with holes down the sides. Looks a bit like my series tow plate but bigger. No other parts with it. Just the plate.
One of the reasons I prefer to live with the leaks on mine. It would be nice to replace the seals but it works perfectly at the moment and I don’t want to tempt fate.