i've mitsubishi mirage 2014 made in thailand 

i've replace the oem nav head unit with pioneer avh1300nex

im trying to find the mounting cage circle in red in the attachment because my head unit is not so stable

any guess where i can find it or just what to write in eBay to find it?

current the head unit screwed only at the top (you can see in the image the screw above the red circle but is not enough.

i'm also waiting for the dash panel from metra to my vehicle but i saw that the cage that they gave into the package is not like this in the image

The red circle on the kit picture shows to screw the brackets onto the front kit....

that metra dash panel?

i've ordering Metra 95-7016GHG

Yes that is the Metra kit in the picture