[cobra_maker]

You are correct- our mistake! The real number for the upper ball joint is AFCO 20034. In some cases the screw joint in the upper arm can get wallowed out. We have seen an insert to fix that and there are some places that sell the upper tubular arm with the new ball joint. The fitting is an Acme thread which is a flat edge so don't make the mistake of thinking the threads have been stripped. Only in a few cases is that true. Ours are $29.50 ea plus shipping.