All the aero II really is, is just a GT3 front bumper and side skirts (minus the rear spoiler/wing). There are numerous sources that you can purchase these parts from other than a dealer. In fact there are several after market companies that make a replica version of the GT3 bumper. However, most of them are made from fiberglass rather than polyurethane. If you are looking for the equivalent to the oem kit, check out
www.mashaw.net. Last I knew, he sold the actual Porsche aero parts at a fraction of the cost.