Garmin edge 705 French mapping options

off to France on saturday for a couple of weeks, lucky me. I might go for a couple of rideouts while i'm there but the place that i am staying at down in the Vendee doesnt show up on my city navigator europe map on my garmin. I'd be grateful if any of you good people know if there is any free french mapping avaialble to download to my memory card that would do as a temporary fix. I dont really want to pay a fortune as i'll probably only use it once in a blue moon so any help would be gratefully received :-)
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It has found the cottage I will be staying at on a back alley, off a side street, in a wee village, somewhere south of Niort.
It all looks promising.
Proof will come in a fortnight.
http://fredericbonifas.free.fr/osm/garmin.html
I used the carte topo version and it was very clear apart from some very small roads in Brittany that it missed.