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My son has a coatings business and has 55 gallon drums of polyurethane resin and the ISO which makes it hard. There are two types of polyurethane processes, one is the hot process which is very hard material and not what your looking for the other is the cold process which is what your looking for, he has done many things for me but its not as easy as it sounds. The poly and ISO must be heated then it goes to a metering system as cold process is not a 50/50 mix then it goes through 50 foot of hose to the gun and mixing chamber this stuff sets in seconds. In doing all this there is a lot of waste and I have gotten 5 gallon plastic buckets of this stuff and cut it with a bandsaw and drilled it with a hole saw but it. If I was home I would send you some but we are in Alabama now for 3 months. If you have a place local that does truck beds, call and see if they do hot or cold process and if they have any waste.

Thanks for the idea's Jack. I think most of the products I am looking at are urethane, not sure exactly how it compares to polyurethane but I have seen where some folks have made bushings with it. The product I am looking at is available in either hardness of 70A or 90A durometer. I am leaning toward the 90 because I know this is going to be under quite a bit of stress.