most of us here use the lemforder arms with the 750 bushings, You can get these at www.bmaautoparts.com. They do not list them on the website but if you call and speak to Patrick he will get them out to you. They are $190.00
for the pair.
They have some cheaper ones on ebay, but no one here have tested them yet.
http://www.bmwe34.net/e34main/trouble/front_noises.htm
darron