You could do with a compression tube as used on the Condor 16/Hurricane 4.9. If I recall correctly this was a 1" od tube with a 1/4" wall and had tube end pieces(solid) that had a groove that slotted over the bridle tangs which were at 90 degrees to the hull. If yours are as suspected in line with the hull you could look to carefully drill through the tube and attach with a large bow shackle which would also be used to attach the bridle. The advantage of this arrangement is that it cannot 'capsize' like the nacra flying foil which leads to expensive breakages.
http://www.catsailor.com/gallery/displayimage.php?album=lastupby&cat=0&pos=1http://www.catsailor.com/gallery/displayimage.php?album=lastupby&cat=0&pos=2Cheshirecatman
