I have no idea where to get hold of a copy of the Revell rigging instructions. The subject is a little more complicated than it might seem, because those instructions have been revised several times in the kit's long life. (The original, 1959 version was considerably more sophisticated than the later ones. Purchasers of the originals were advised to make the jackstays out of piano wire, and buy eighteen feet of 36-link brass chain for the sheets and halyards.)
If your objective is to find out how the ship herself was rigged - that's easy. The set of three plans by George Campbell provides one of the most detailed, comprehensive pieces of information about a sailing ship that you'll ever encounter on three sheets of paper - including extremely detailed information about the rigging. The drawings are available through the ship's gift shop: http://www.cuttysark.org.uk/index.cfm?fa=contentShop.productDetails&productId=40&startrow=1&directoryId=6 . They surely are among the biggest bargains available to the ship modeler - especially for American modelers, given the current, relatively favorable state of the dollar vs. the British pound. Highly recommended to anybody with any interest whatever in the Cutty Sark.
A visit to that website is worthwhile for a variety of reasons. It appears that the restoration of the ship, though slowed down by the awful fire in 2007, is back on track, with a projected re-opening of the ship to the public scheduled for sometime in 2010.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.