What is this piece called?
 

Sorry, I tried to search but have no idea what key word is...
Also, where to get one.

Thanks

https://www.rx8club.com/attachment.p...3&d=1185768590

http://www.mazdaparts.com/ProductDet...000-1159943707

http://japanparts.com/db/partslist.p...ey=091-030-004

both forum vendors