Click here to download a (about 31k) zip file of many many (about 80!) fine Kinnikuman/M.U.S.C.L.E. icons for (i am sorry to say) windoze only. I will probably convert some or all to mac icons some time
I was not responsible for the creation of these icons! Big thanks to Brian (ang007@earthlink.net) for sending me these, and to Hayato Nagare for making them in the first place (so the copyright is his, ok).