My Mustang recently developed a squeeking front end. Everything under the front was new about 3 years ago. It has about 5k miles on it. Using a stethoscope, I noticed that the sound appears to be coming from the front right spring. The insulator between the spring and the perch or saddle has fallen apart and is only halfway doing its job. I have looked online and can not find anthing to replace it. I did find completely new perches, but I don't want the whole part. I have NOS Ford ones that do not have much use on them. What can I use that will be durable enough to hold up as a replacement?