You can get them off of Amazon. They're made by EMPI and not a bad price. Part # are 80-1039 for the complete assembly or "long side" with the inner joint. 80-3619 for the 'short' assembly minus the inner joint which is what most people go with unless the existing green inner cup on the vehicle is too messed up to reuse. I just used two of the 80-3619s and they work great.