To do so, please follow this forum link :
http://spa23.forumgratuit.org/t855p15-skin#5881
Page 2, look for "Pack ici" in big red font.
Be aware that all those skin wear an ellipse with our personnal insignia (one by pilot). We all come from Rise of Flight, and applied what Escadrille 23 made by the time. We kep it moving to CoD.
So you will not get historical skin. I've tried to stick as I much as I can to reallity (applaing for example type A or B depending of the serial number).