CD Stacker for 2004 Focus LX

[correva]

I have just bought a 2004 model Focus LX which comes with the standard CD player/radio in it. It says on the unit that it is cd changer compatible, so I rang up Kloster parts and they want to charge me $732 for the cd changer. I could not believe the price.

So. Does anyone know if it will accept any type of changer unit? I would prefer an mp3 player/radio, but the original one does take up quite a lot of dash space and I don't want to spoil the look of the car.

Any suggestions/ recommendations would be greatly appreciated.

Thanks heaps.