Newbie question: installing new stereo

[nivanov]

Hey everyone. Sorry if this has been addressed before, but I just cant seem to find an answer on these forums. I have a Yaris 2007, and the headunit looks like this:

http://www.autobytel.com/images/2007...a_Yaris_16.jpg

My understanding is that some models come with a head unit that looks like it was fit into a standard double DIN. However, as you can see on the picture, the plastic housing for the radio unit in my car is custom-fit for all the buttons and knobs. If I were to replace the radio with a better one, I'll need a plastic housing replacement that will leave a nice two-DIN opening in my dash once i remove the radio and change the housing. After that, I can mount any standard two-din component in there. Can you point me to a manufacturer/part number so I can accomplish this? So far, I can only find Metra kits, but they look like they only come with two triangular-shaped side holders.

Also, please confirm that my model of Yaris has two DINs.

THanks a lot!