GE Profile Fridge leaking water - warping the floor!

I have water coming from where the line going to the ice dispenser in the freezer comes out from the main water valve. The line somehow became kinked (it appears to be black plastic?) and is now leaking. Can I replace just the line or the entire valve? And how does the line connect to (more importantly DISconnect from) the valve? Do I just yank it out? How is it fastened to the valve? Where can I get the part I need?

Any help would be greatly appreciated.