I have 2 slightly used lower control arm monoballs. These are Porsche Motorsports parts and not knockoffs. They are used to provide an adjustable camber for the front or rear of 996/986. The actual control arms and shims are not included, but i can get them for you as well.
Compare to the tarrett parts and price.
http://www.tarett.com/items/boxster~cayman-products/lower-control-arm-monoball-996-997-boxster-cayman-lcamb996-detail.htm
Im asking $500 shipped. Save the shipping from the tarret parts and hundreds less than the sticker price for these porsche motorsports parts.