Hi Jeff.
I bought the OEM version via Ray at SL Classics. The kit included the long bolts & nuts, the sleeves, and rubber bushings as well as the two larger rubber pieces that go on torsion bar itself.
Regarding these latter bushings, my kit came with ones for the 250 & 280 bar which is slightly thinner that the original 230. Ray felt they could be easier reemed out to fit larger bar but I decided not to try it.
I may buy the larger bored ones individually sometime (or would trade someone who needs 280 style...)
Good luck
James
63 230SL