What do you call the plastic part that holds the coupler to an Athearn HO F7A body? I just can't believe I lost both. I'll ask my parents to buy me a pair when they visit California and Texas. I live in Quezon City, the Philippines, and the lone model railroad shop here has folded up years ago. BTW, is Houston, Texas, a good place for HO model railroad shops? Can you recommend me one?