actually they did come with a pair, flat bars with a 'notch' in the end that pivot on the ends of the brace rods that attach to the firewall - the latch rod inside the hood side sat in the notch - also had a strap attached so the hood side could be fully folded up without falling against the other side
sort of visible here .... mostly the straps are long gone, and frequently the actual flat bars were left off after some repair .... there should also be a rubber cap on the back corner of the hood side so it can be sat against the top of the cowl without scratching the paint, those should be available from the vendors
Bill