These should work well! Been using the 70 durometer, 1.5" poly's, and while it's calmed down, I'd prefer quieter. These are rubber leaf spring bushings for a GM, part # HB-902. Feels rather firm, but I'm sure they are a little softer than the poly, plus I think rubber has better damping characteristics. Probably need to be cut slightly, and I doubt the sleeve will fit ... hope that's not an issue. Will install soon.

Measurements:
Overall length = 1.75"
Barrel length = 1 3/8"
Lip length = 3/8"
Barrel diameter = 1 1/2"
Bolt hole = 9/16"

https://cimg3.ibsrv.net/gimg/www.mia...1c61de8588.jpg
https://cimg5.ibsrv.net/gimg/www.mia...19d600c70c.jpg