I bought some colored anodized lock nuts from Mezel Mods more than a year ago. Not sure if they carry them anymore. My experience: They look great until you wrench them too much and then look pretty banged up. The similarly colored insert is the only way to go. The supplier was small scaled and I think bailed as the demand was too low. They were expensive, a 20 pack was $14.99, a 10 pack was $7.99. I have them on my MMr and like them.