The Hobgoblin has them; some are pretty pricey, but a few are more reasonable:

http://www.hobgoblin.com/local/contfram.htm

And Bob: The bouzouki is a long necked lute developed in Greece from its Turkish roots. Originally 6 stringed, it now usually has 8 strings tuned CFAD. Irish musicians travelling in Greece picked up the bouzouki and adapted it for their use by re tuning to GDAE or GDAD. Modern makers started making them with flat backs Bouzoukis have a longer neck than mandolas, and are generally better for chords. (From the above web-site)