porsche pcm2 sat nav disc & update

[Clemo2580]

hi, im new to piston heads and am after some advice on my 2003 53 plate cayenne. i am struggling to find sat nav discs all over ebay etc.

i have done something i was advised on the site to find out the info of my pcm. i got-

pcm 3.0
system software 3.0
telephone 3.0
device type 6635
serial number 35034576

this made me think it was a pcm 3.0 but obviously not.

im beliving mine needs cd rom not the dvd discs?

does any one have any for sale or advice on where i can get some?? i only need for uk.

thanks guys