The bolts you need are 10mm bolts with flat washers. The easiest way to go about replacing these with OEM bolts and "screws" is to go to a U-PULL IT salvage yard with your own tools, find a 90-92 Civic and get the bolts and screws from that vehicle, pay the $1.50, and on your way. Otherwise, go to a hardware store that sells metric bolts and buy them new. They aren't anything special, just bolts.