Several years ago while planning a scratch built truck with some flat exterior panels that needed handles I bought some slam locks from a place called the parts dept.They were offered by McKean models co,707 E.41st.St # 236,Sioux Falls,SD,57105.There are 8 pieces on a sprue molded in black plastic.Don't know if they're still around but if they are that just might be what you're looking for.