Stuart replied:

someone on ebay was selling something similar to that, go to the automoblie section, then 4wd accesories, hope this helps and good luck on your trip, regards......Stuart

mrdesmo replied:

Hey Joost,
As Stuart just said, this bloke on ebay was making them and selling them...I did a search a found his ad again...
roof console
If ya don't know ebay, open up this link, (something else he is selling) then click on "ask seller a question", then tell him what you want....
If you can't get in touch with him and you want to, let me know and I'll try to organise it for you as I am an ebayer from way back!
(Hope the links work, my first time)
Cheers