Everyone here are two threads regarding that Louvre Brace, With Logo part number A1000021.
They are available at any of the DeLorean Motor Company affiliated service centers.

Longer Louvre Struts for DMC Louvre Reinforcement Brace
http://dmctalk.org/showthread.php?64...orcement-Brace

Installed louvre brace
http://dmctalk.org/showthread.php?46...d-louvre-brace