Auto Dimming Rear View with Compass 4th Gen

For those of you who have this, or know where to get it...is this really a toyota option. I live in virginia, and i called the parts department for my 04 4runner looking for the auto dimming mirror with compass, and they dont see this part. They told me it maybe available in some regions but not all. On the toyota.com page for the 4runner options, the mirror is listed there. I was wondering if anyone knew if that part is actually a toyota made part, or if the dealers use an aftermarket mirror. Ive found a few on the internet as an aftermarket part labeled as a toyota part. Ive also found that they label this mirror as a toyota part, and an aftermarket part on the same website. Does anyone have a part number or any information at all?

This where I picked mine up at.
http://www.mitocorp.com/flash/nightvisionsaftey_autodimmingmirrors.htm
They are universal fit.They come with different fiitings for different cars. All you have to do is hookup power, mount the temp sensor and run wire inside of vehicle. Oh yeah and calibrate the compass.