I have a few hi-cap NFML .40 S&W magazines which I disassembled today for cleaning. I noticed that the followers are not identical on the mags, and I thought (because I am somewhat pedantic) I would order new followers and maybe all other parts for them all - i.e. rebuild them all. But when I started looking for parts, I couldn't determine which parts are sure to fit my mags. Can someone give me quick answer on what to order? and where? Thanks in advance.