Defective Idler Arms

I replaced my Idler Arm on my 69 Swinger about 5 years ago with a Moog Idler Arm. I heard a clunk recently while turning the steering in the garage and noticed that the bushing end with the large bolt and nut had slop. I removed it, secured the bushing end in a vice and tried to rotate the arm. The arm was locked up on the bushing and the whole bushing rotated, not the arm around the stationary bushing.

I ordered an AC Delco Idler Arm and had the same result. Then I ordered another Moog…same thing. I called Moog Tech and they told me that maybe I needed to “wake it up”, by whacking the arm back and forth sideways on the bushing with a hammer. I did that with all 3 Idler Arms and not one budged. It seems to me that the tolerances must be off and there was no quality control in that regard. The Moog Tech also told me to return the last one and order 2 more to test, which I haven’t done.

Has anybody ever purchased a defective Idler Arm? Or did you check the Arm movement in a vice before installation? I didn’t think to check the Idler Arm movement years ago with the 1st Moog, which wore a groove in the upper part of the K Member Bracket (I had put the 1 washer that came with it, under the bushing).

Has anybody bought an Idler Arm recently that works properly and if so, where?

Thank you for any forthcoming recommendations.