Who makes quality lower ball joints?

these guys

http://www.sankei-555.com

Used to make metal on metal ball joints under their own 555 brand and for many many other companies for reboxing as their own parts.
i have 555 lowers and they are pretty damn good. obviously mine have an adjusted design for RHD, slightly different angle of the levers to the track rods, you would need 2-3 full turns out on the track rod end to use on a LHD car...

with the seals off what you could see looked like a clone of what was taken off and that looked original.