The dubro wire bender. I've spent a lot of time looking for a proper one, but all the other ones don't have a good enough radius or needs additional vices to hold them. You'll have to buy something to clip it also, I doubt you'll be able to clip with just pliers. From the top of my head, the size is 0.048" carbon steel or music wire. They usually only come in packs, but I guarantee you'll need need to bend at least a few to get 1 good one. All this is roughly a ~$40 investment before you bend your first one.
I was planning to write up a guide on this but haven't had time.