I did not find any bushings that fit. I could order the arm for $70-100 from the dealer or get a used wiper transmission on ebay for $60 shipped.
However, I found another solution that works temporarily. On this arm (called the lower arm) there are two bushings on opposite sides of the arm. I interchanged the bushings. One was still good and the other is loose. The loose one is on the side that fits down onto the fitting (gravity holds it down). The good bushing is on the fitting that is facing upwards so it does not fall off now.
Hopefully, this will last for a while
dlm4ut