Navigation System Display Unit

Hi Everyone

I have a 2002 Disco 2 with a Becker Navigation System installed.The display unit isn't at the momment displaying meaningful information. Does anyone know where I can get a replacement display unit? it is the part that you can clip off from the main unit that acts as a security device.
Thanks for any help

Wrong bit of the forum - this is for the old, pre Defender series. Try the Disco section.