I have been lucky to win some old front coilover set of an ebay. It was a  pretty old Tein setup. I contacted Tein for some spare parts that I needed for rebuilding them, but they informed me that this was a 30 year old unit and that they basically could not help. It was a whole strut assembly - springs perches, insert and camber plates. I also won a set of rear bilstein inverted shocks on a different lot. Here is the "new" suspension when it came home: