I have one of those Taxi's. I bought it off ebay from a guy in France. I recently brought 1 in for a friend, and paid under $40 AUS for it, postage included. They are a good quality model, much the same quality and size as Trax.
They are put out by a Spanish company called Altaya, and could be bought in France and throughout Europe. They were a part of a series of cars called Taxis of the World that came out regularly with a booklet and model packed together and started in January 2002. The books are written in French. These would be similar to what we can on occasion buy at newsagents.
Here's a pic showing a few of the series and their booklets:
Regards
Alex
A clearer pic of the model out of packet.