My wife and I both have double line stunt kites, which we enjoy flying whenever possible. I also fly a large single line kite from which I hang a camera to take aerial photographs of archaeological sites. Have a look here:
kap.
Greens Kites of Burnley supplied the KAP kit. We bought the stunt kites from Windseekers in Wells next the Sea in Norfolk. There are plenty of kite shops around, often tucked into litle corners of shopping centres.