Do you know a reasonably priced frame builder in your area? I'm converting an early 80's Specialized Sequoia into a tourer. The bike already has triple cage mounts on it for water bottles, but I'm having a local frame builder add canti bosses and extra eyelets to the fork and dropouts for $80. If you can find a someone in your area, you might be able to customize your frame a bit inexpensively so you can use regular racks and not have to buy a trailer.