Oizo,<br />there's an astonishing bunch of Graf (and not only) tapes at:<br /><a href="http://ourworld.compuserve.com/homepages/JPooley/" target="_blank">http://ourworld.compuserve.com/homepages/JPooley/</a><br />Wonderful guy, too
A very good site for tennis videos is also:<br /><a href="http://www.geocities.com/videoarc/" target="_blank">http://www.geocities.com/videoarc/</a>
If you just want to trade the video or have more info email me privately.