Please put the reason you need one in the extra info section. lol
FWIW, I believe the OP is asking for one of these:
![]()
I believe that is correct ......
I bought one from CRC a few weeks
http://www.chainreactioncycles.com/mobile/au/en/shimano-fc-m582-crank-arm-fixing-bolt/rp-prod32877
Cheers. I saw them, but wasn't sure if they were the same. There are some mixed responses in the questions.