if it only tiles in one direction, you could use a non-square texture, like a 256x1024. Then you unwrap the unique elements inside of the uv borders and have the tiling elements cross it.
you can cut your polygons anywhere and tile with geometry. I often do that if I have to use texture pages. Each element below is made to tile on it's own (being stipes or bricks...and some tests that didn't turn out too good =) All the elements are placed tp specific numbers in PS beforehand. Then I used textools to map my…