Did you cut your bump stops too much or are you bottoming out? Wellll...then buy this set of Fat Cat Motorsports front bump stops and "machined" spacers for Yaris hatch or sedan. I originally had these on the rear of my car before we figured out that the rear needed to run a smaller inside diameter. Used for about 200 miles before I swapped them to the smaller size. These are acually the same set that go on the front, spacers and all. You can take them away for $20 shipped.
Again, this is for the front of the car.
Here is a link on the topic.
http://www.yarisworld.com/forums/sho...ght=bump+stops