I just repaired the ears on a middle sized Garret coil for a buddy. Took some 1/4" plexiglass, cut a small rectangle about the same size of the ear, then took three nylon washers, cut them to fit inside the indentations for the bolts on the sides of the 'half' ear that was left. Then used Loctite 'plastic' bonding and it appears to be really solid. It aint pretty but it is pretty strong.