B4 rear lights 'middle part' ?

[UnitxTWO]

Hey UKP

I've seen plenty of b3 rear lights with a middle part 'mittel blende' from hella etc.

But i have NEVER seen a b4 with one.. until now:
http://prntscr.com/3dfyap
http://prntscr.com/3dfyvi

Have you seen that one?
Does anyone have information about it - i suppose its not a US part but im not sure..

Anyone have the part-number or have one for sale, or maybe you have details about pricing..