I took off my watch today and noticed some discoloration on my nato. I removed it and noticed that one of my spring bars was rusting at the point where the end slides into the center housing. I change my straps, bracelets, and natos so much I have no idea where I got that particular one. Think it might be time to trash the ones that I have and get some new ones. Where does everyone purchase theirs? I could use some recommendations on where to get good quality spring bars that won't rust or bend.