I got something for all future FFX-2 Gun Mage cosplayers. This is the Gun Mage gun:
Even though this is mainly for Yuna, it can also be used for Rikku and Paine. The only difference is with Rikku's, just mak the ring thicker. With Paine's, make the gun pattern a little smaller and just add 2 different size rings, 1 small and 1 medium size.