I don't know much about full dpn sets, but I have an idea for the DPNs you already have. What I do for my DPNs is I store them in an old pencil case of mine. What I have is a Mead Five Star pencil case and it holds everything I could need. It's really super handy. Another thing I used to do is store them in one of those handy baby wipe cases not the really big pop-up wipe containers, mind you, but one of the ones that are small and fit in your purse.