I got mine from Autozone for about $47, they had it in stock. Depending on how bad it's leaking you might be able to limp it along for a bit, but you'd have to keep adding to the fluid reservoir. Might not be a good idea if it's literally dripping in front of your eyes, mine was a slow leak.
+rep to Notoriousone, I wish I'd had these pictures to help me out a month ago, would have made things much clearer and faster. Good write up man.