If it is a .flv (flash video), it is likely ancient and one would be hard pressed to find anything that isnt on an official site.
according to history of the .flv:
Scroll up and check the website tagged in the corner of anything and that is where you'll find it. Also the adult film database to narrow it down to what 'type' of content you are after. Oftentimes scenes are not tagged with the performer, so you might have luck looking for the scene, instead. Happy hunting.