There are quite a few of these in existance but I doubt anyone knows how many. This is one of the most sought after 1950s era fridges so prices can be rather high. As far as the best price range for you, that is entirely dependant upon you circumstances and ability to do some of the restoration. Less expensive ones usually require more restoration work but be careful, some people list ones in poor condition for high prices. Missing parts will be very hard to find, especially when one is located overseas. Other costs need to be considered such as converting to 220 volts, painting, and rechroming - I have no idea what these services would cost in France.
Ultimately, it might be more economical in your case to buy one already restored, then all you have to do is plug it in and use it. Ebay is a good place to look for one, as are the vinatge appliance restoration shops. The restoration shops do not sell unrestored refrigerators, they include full restoration in their pricing so even if the photo of the refrigerator on their site shows a rough looking fridge, they will restore it when a customer buys it.