You realize that if you buy an N810 in France you will get a weird AZERTY-layout hardware keyboard, don't you ? :-)

Anyway, I concur that you don't stand much of a chance of finding one in a shop. Maybe try your luck in the Lyon "Fnac"...

Another option could be online classifieds for second-hand units. For instance, if after Lyon you are continuing southwards to the Côte d'Azur, there is one for sale near Toulon :
http://www.leboncoin.fr/vi/20397943.htm?ca=12_s