Cut off the plastic mounting feet, like the ones that broke off. Take off the fabric retainer and replace with a metal combo piece. So you are pulling on metal. In this method, you should try and add an additional screw. "Screw and glue" the metal piece to modified arm rest. Paint metal piece black or door color. I don't have an AD or an arm rest so can't study the situation fully. My best shot for now. I've seen arm rests with similar method.
3/32-1/8 thick steel
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
