Hi Maxime,
Well, [http://www.ebay.fr/itm/OEM-ASUS-GOOGLE-NEXUS-7-WIFI-TABLET-REPLACEMENT-FLAT-FLEX-RIBBON-CABLE-ORIGINAL-/130901667450?pt=LH_DefaultDomain_0&hash=item1e7a58ee7a#ht_500wt_982|here] is a great offer from a US-seller that sends worldwide. To France, you only pay $6.50 postage.
However, you might want to take the product number of this connector cable (ME370T_LCD_FPC) to google in France or around.
Salutations à France!
Steffen