wanting to add a double din head unit, need help..

Im wanting to change the head units in my car, currently I have a 96' with the mach 460 system... A picture of how it looks is attached below. If you look at it you can see the CD player is seperate from the AM/FM tuner. Thus if I change these two out for a cd player head unit I will be left with an open space.
I want to get a double din head unit, similar to the one in the 99+ stangs, except it wont be the stock head unit. So I was wondering if I could take out the peice that goes around the headunit, the A/C controls, and the vents from a 99+ stang and put it in my 96 so that I could fit a double din head unit. Hopefully someone knows if the trims peices will interchange or not.
Attached are two pictures, one of my 96' setup and one of a 99+ set up with the double din headunit that came factore in those. This will give you some idea of what im talking about.

Thanks in advance,
Shane.

What kind of modifying and cutting did you have to do? Just wondering so I will be prepared. Thanks for the info.

Shane.

Where would I find this 03-04 IUP silver trim at? And by the way thanks for your help guys.

Shane.