Like the title says, does anyone know it or have an idea where I can locate it?

 

The full kit part # is QSEA 50 360.
From the DIY section: http://www.hi-impact.org/ryang/modif...8_diffuser.pdf

I bought a rear underspoiler from craigslist, and didnt get the mounting hardware. I was able to pick up most of the pieces from autozone. I was not able to find the "Bracket A" and "Bracket B". The local dealership said its part number QSEA-50-362. They said there was 0 available at Mazda USA and 0 on order (checked 2/25/10). When I get around to putting it on I will just run to the hardware store to find something brackets that I can "work" with.

 

Are you guys talking about the underpiece of the rear bumper? I am looking for one as well. Can anyone help.