The first question is, does
@woodbutcher really, really really want a Raleigh? If the answer is yes, and let's be honest we can all understand if the answer is yes, and if you are in South West France then it means paying a premium over UK prices. Unless of course you are very patient and or very lucky.
If on the other hand the answer is "I just want a nice old bike" then it is game on and welcome to the world of old French bikes with idiosyncratic threading and 7mm bolts on quill stems.
I had a similar experience. I live in Brussels and was looking for a Raleigh, I had my eye out for a Team Record, the European market model with 531 frame. Despite following the small adds for Belgium, France and Raleigh mad Netherlands, nothing suitable came up, so after a few months I broadened my search, to nice but inexpensive. I then got very lucky and stumbled across a Peugeot PY 10 misdiscribed as being Aluminium (Owner had confused his Reynolds) and in the Dutch speaking part of the country where almost no one is interested in French bikes. As a result both the seller and I walked away happy.
The moral of this rambling tale? You can find love in the most unexpected places