The company is "Metra" they make all kinds of speaker brackets, head unit fit kits, etc. Search eBay, Amazon, some of the stuff is even available at stores that do radio installs ie Best Buy, Circuit City.
dont go too crazy with the 6x9's, if you get some with a big magnet theyll still sit on the crosssbars (forcing them in) and the clip wont really fit. i had to make the clips work, didnt really clip in like the pic above. good luck