Last weekend I got all the major components grounded with a kit from Matt Blehm. Surprisingly the idle became even smoother while driving and during morning warmups as well. Great kit!
Here are pictures of the grounding kit installed:
Here is a picture of one of the four front sway bar bushings that were replaced:
They should work just fine if they are thick enough and have good insulation that will not crack over time. The only real drawback I can see on those premade kits is that the wires are not measured to fit your car, so some of them may be a bit loose or need to be clipped and fitted with new ends.