iv got a problem does anyone have a standard rear brake caliper.

I started to change over my rear pads got the nearside done without a problem but once I got the drivers side off i found the seal is burst now I cant wind it back in.
i know a lot of you guys may have upgraded the rear brakes i have a 1.9tdi so do any of you have a spare caliper available, cash waiting
if not who knows were the best place to buy one from and what it would cost.
thanks for any help guys.

I was hoping for one a little quicker. Thanks anyway. ill let you know if i dont pick one up before then.