Dennis, when I saw the foto of your bushings, I got an idea why yours are cut and disintegrating (but this is purely speculation, not knowledge). I had the impression that the washers may be the culprit due to the (comparatively) sharp edge of the washer against the bushing. On top of that, I thought my washers were installed as yours are. I was wrong, and my washers are installed as Kenny pictured. Mine have been installed for a couple of years, but I'm sure I don't have near the mileage on mine as you. I bet with the new bushings you ordered and installing the washers as Kenny suggests, your problem will be gone. Here is mine:
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