I have a Renault Laguana with original blaupukt radio/c & want to put in a cd changer any ideas?

I would save myself the trouble and buy an MP3 capable head unit. They are much more cost effective (not to mention modern)than a changer.Much easier to install, and you can write as many songs to ONE MP3 disk as a 12 disk changer will hold!! Also, if you have ever had to load a trunk mounted changer in the rain......Also some interesting tech in some Sony model head units is A trac compression. With the right software, it is possible to write almost ONE THOUSAND tracks to ONE disk!!!! As technology moves forward.... Move with it.