www.aimind.com has strut bags,
www.airridetech.com has badass strut bags that are a WHOLE lot more expensive, and
www.streetbeatcustoms.com has MacAir cylinders, for strut cars, and i believe hack shack has a number of Macpherson options these days too.
My air ride was the furthest thing from bolt up imaginable...lol, i dunno what bolt on means anymore