I agree looking at the pins at the bottom and the socket to the top left hand side it definately looks like a Nokia fit, it looks the same as the one in my car which takes the old Nokia 6310 handsets. Ive never used it though. I got the new Alpine head unit fitted that pliugs into the IPOD (which goes in your glove box) and it has a handsfree fitment that connects to any phone via bluetooth
If you do manage to find it, and it takes a SIM card, would you be so kind as to post a pic of the arse end of it so I can see if it's got the right connectors?
And if it has, and it works, I may just want to buy it off you