Nissan: Almera - replace CD-player for a CD-changer

Hi,

I´m looking for a CD-changer for a Almera acenta 1,5 dCi (Car bought
11/2003 - Germany).

It has a cd-player integrated. Is there a possibility to change it for a
CD-changer?
Or is there a CD-changer on the market to mount it additional below the
existing cd-player?


Many thanks in advance!

Simon