replace ignition barrel?

My gsxr 600 k1 recently got stolen, luckily I got it back, the damage wasnt to extensive, but where a screw driver has been forced into the ignition barrel i can no longer start the bike, I know how to replace the ignition barrel itself but there are two bolts on the underside and i dont know what tool to use or where to get it from, any help or advice would be much appreciated, thanks