Can try RapidRun cables for this. They are well built, even designed to be pulled in conduit. Comes in lengths up to 100' or so—
- http:/ Opens a new window
/ www.rapidrun.com/ categories.asp? cat_id=8841003 - Do insure to get the right cable for the installation (DVI, HDMI, VGA, etc), though flying leads can offer some flexibility