D.R.,
If you know anyone whos passing through or in the gulf the going rate for a Nokia CARK-91 in Dubai is approx $100. There's a possibility (depending on your network) that you may need to buy a different aerial at home though.
As people have already said, installation is simple enough. Mine took a couple of hours but an awful lot of that was lifting (then refitting) the centre console to route wiring.
Cheers
RP