Its not quite the answer you are afater but Why dont you have a look at narbonne accessories website www.narbonneaccessoires.fr
they sell different hoses suitable for french bottles for abt 15 euros, if you re struggling with the site order a catalogue which will tell you how and where they also have 50 shops all over france including rouen and lille.
On a personal note, there is a lot of panic about gas, I struggle to get through 11kgs of gas in 3 weeks of no hookup and lots of cooking and some heating/hot water.
they sell different hoses suitable for french bottles for abt 15 euros, if you re struggling with the site order a catalogue which will tell you how and where they also have 50 shops all over france including rouen and lille.
On a personal note, there is a lot of panic about gas, I struggle to get through 11kgs of gas in 3 weeks of no hookup and lots of cooking and some heating/hot water.