http://www.skylinesaustralia.com/forums/topic/373144-jun-rb26-head/page__p__5952000#entry5952000
link to my topic in the main for sale forum. pics are on the first page. thanks
also the retainers arent a required upgrade for these cams. so i doubt they have been done. info is on the JUN website...http://www.junauto.co.jp/products/cylinderhead-part/camshaft/camshaft-rb26.en.html