if its not on the oem parts list you cant buy it single. you will have to get a new caliper online. buy them off ebay, you can get them cheap. or talk to NYUK on here he parts bikes all the time. that bolt will comeout. but it looks like you beat the piss out of it to get it out, your going to need a new one. but it doesnt look like you can buy a new one. so just repalce the whole caliper.