I replaced my OEM Kenwood DVD surround-Sound system with a SONY Blu-Ray BDV-E390 system, Here's a link to Amazon.com:
It fit in the same slot above the drivers seat with lots of room to spare. I didn't use the speakers that came with the Blu-Ray because I didn't want to deal with the mounting issues and the old speakers work just fine. But, I had to cut off the old connectors on the end of the speaker wires to splice in the new different style wire connectors that connect in the back. I think I also had to buy a new optical or HDMI cable to hook it to my OEM Sharp TVů the old system just had the old plug in connectors with the red, white, green, blue, etc., ends. I hope I remember that correctly.
BTW - If you need further quality advice on AV or Satellite systems "Jim A" is my "go to" guy