i have ksport gt pro's on mine. a lot of people do lowering springs and kyb adjustable shocks.
if you want other suspension pieces, check powerflexusa.com, whitleine.com.au, cusco.co.jp/en, laile.co.jp/eng/index.html.
trust me... i have looked everywhere and these are the main sites for the hard-to-find parts for our cars. PM or post here with any questions. mod list can be sent if you want.