In about 15 minutes of searching, I found 10,000 pound capacity snatch blocks on Ebay for $17.50 each (3 required) and 100 feet of 3/8" cable for $62.50. Free shipping on both items. That's enough to rig a 30 foot pull with a 4-line setup.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!