If you are manually inserting coils, then these pliers are invaluable, as crimping the end of the coil ensures that the coil stays put.
Renz Binding Wires A4 34 Loop 3:1
Presco Binding Wires A4 34 Loops 3:1
Presco Binding Wire Spools - 3:1 Pitch
Renz Binding Wires A4 23 Loop 2:1
Plastic Binding Covers