Good rulers are expensive here, there, and everywhere. I usually wait and buy them when on sale or with a coupon. My LQS carries creative grids and I am IN LOVE. I was a loyal Omni Grid user and still am since I can't afford to upgrade. But I do have a coupon from my LQS for 40% off one item in March for quilt month and I am gonna splurge on the 24 x 24 creative grids!!!!
Every once in awhile connecting threads will have their rulers on sale. I don't know if they ship internationally at a decent rate. Also have you checked ebay?