I will be installing new front coil springs and struts on my 05 screw in the near future. My truck has just hit the 80,000 mile mark. I was wondering if there are eurethane pads or seats that the springs are compressed between ? I thought I have seen this somewhere before. If so, are there replacement parts that are better than OEM ? Where do I get them ? I figure this would be a good time to freshen things up.