Here is another product I’ve been pointed at. It might be useful for some of you. Black Box P USB Ultimate Extender over Multimode Fiber. Extends USB 2.0 up to 500 meters over multimode fiber.
Extends both USB 2.0 and USB 1.1 up to 500 meters (1064.4 ft.) over multimode fiber.
Provides true plug-and-play capabilities, ready to operate right out of the box.
Works with Windows®, Mac®OS, and Linux® operating systems. No new driver installation is required.
It's ideal for a wide variety of USB devices, from printers, scanners, hard drives, and audio devices, touch screens, Web cams, and more!