Try the v-Link by sewell. A VGA extender over Cat5 with Audio, extending your signal over 950ft. At a price tag of 124.95, the v-Link can't be beat.
Your long-distance
VGA wiring problems are over with this Gefen super-extender that uses CAT5 cable to send your VGA signal flawlessly to a remote display up to 330 feet away.
An enclosed 6 foot VGA cable connects your source to the sender, which repeats the signal a maximum 330 feet over a CAT5 cable to the receiver which feeds the signal to your display.
Customize the length of your Cat 5 cable with our economic CAT5 Network Cable Kit which comes complete with 1000 feet of cable, connectors, crimper, and tester for around $70.