this is the best lowpro gpu i can findhttp://graphics-cards.findthebest.com/l/1126/Galaxy-GeForce-GTX-750-Ti-OC-Low-Profile
but any low profile 750/750 ti or 7750 will do you fine so long as you have. for the 7750 make sure your psu will support it
I looked up the galaxy and I can't find anywhere to buy it. Is it not out yet?