I have a pair of aluminum rear spindles from a Q45, exact same as the Z32 ones. They shed ~8lbs of unsprung weight from the S chassis steel ones (if you don’t know why that’s a benefit, google it!)
I have the conical ball joint inserts to go with them, to put these on your car you will need a Z32 lower mount for your coilovers, you can usually order these from the manufacturer, they are on ebay from time to time as well. JRP was going to get them for me but I didn’t end up putting them on before selling my car.
Will get pics up this week.
$80 obo