HELP PLEASE - replacement of '04 C70 Coupe stereo...
 

I Just purchased a 2004 C70 Coupe, and very much want to replace the stereo - especially the head unit/system in the dash with a high end system.
First off, I cannot seem to find a trim piece that will PROPERLY replace the extremely large stereo trim panel that comes in the vehicle. Can anyone help me with this PLEASE?
Also, has anyone replaced this stereo successfully? If so, what did you do? I have had several professional shops tell me that they couldn't replace the necessary trim piece in the dash.

Secondly, can anyone tell me anything about the nature of the head unit that is in the vehicle now (mine does not have the speaker o top of the dash that I have seen in some versions of the car) - in case I an stuck with it:

1) WHAT MANUFACTURER made the head unit (and what else can you tell me about it;

2) Are there power amp outputs available FROM the head unit (so I can attach my power amps and sub); and

3) does anyone know how I can attach my iPod to the head unit (preferably from behind it), as I use iPod pretty exclusively for source - never use cassette, and really don't want to go back to CDs.

Finally does anyone know what size speakers are used/called for in each location?

I would appreciate all the help I can get!!!!!!!!!!! I cannot find ANY factory information/specifications/details on the stereo. Does anyone know if this info is available?

I am desperate, and need to do something in the next week as I am about to take a long road trip