I bought it from Harbor Freight. Plus with those "25% Off One Item" coupons they send out regularly, the price isn't bad. Plus, it's beats the hell out of trying to lift a keg full of water or wort. Here's what I got:
I have a Harbor Freight block and tackle I plan to put in a rafter above the center of a fermentation freezer. I can hook onto the carboy handle and lift and lower into the chamber and slide across the bottom.