See this thread for more info.
I have made a deal with a company (made in America, baby!) to have rebuildable ball joint bushings for E24/28/31/32/34 upper control arms made. These have replaceable polymer races and nickel plated steel balls. They can be run with or without lube, but I will assemble, lube, and torque each set of bushings before they are shipped out (for other applications they are shipped dry and in the pieces shown below.) These can be renewed indefinitely. The replacement races retail for $12 per bushing. I have purchased the tool required to rebuild them. I will lend the tool out, but will also offer it for retail at $25.
Group buy ends May 5th. Lead time for delivery to me is 7-10 days. Shipping of all orders will take place the Monday following my receipt of the bushing parts so that I have the weekend to assemble them, pack them, and label them. 50% deposit required by May 5th and remaining 50% payment will be due within 3 days of when you are notified of my receipt of shipment. I can only take Paypal on this unless full payment is tendered by money order by May 5th.

These are the parts that make one bushing. This is one that I have just received that I must mod to test on my own car. The ones we are purchasing directly from the manufacturer will be made with 50mm wide balls and 58mm diameter housings so that they will be a direct fit for E24/28. The E31/32/34 orders will come with a pair of washers to make up the extra 6mm needed.
Please email paulm at directedvapor dot com with questions or Paypal payments. Please make sure to include your shipping address with any payments and make sure I know whether you need E28 or E34. Please include the word "bushing" in the subject so I can filter the emails into their own folder.