they do occasionally turn up, but are rare.
this is a basic balkan karakulak yataghan which i found on ebay by accident a couple years ago. came from an ebay dealer in varna. haven't seen any since, tho more ornate turkish ones appear on occasion. on ebay, caveat emptor.
this is a good site to check here in the swap section (mine not for sale at the moment)
http://myweb.tiscali.co.uk/gladius/yat1.jpg
http://myweb.tiscali.co.uk/gladius/yat2.jpg