New Partsmaster/Edelmann power steering gear box seal kit.  If you have a good functioning steering box, and it just leaks, this is an excellent way to save you some $$ vs buying a remanufactured box.  This is for boxes with the 4-bolt cover (vs c-clipped cover)

NOTE : This does take some patience to install, and you will need a pitman arm puller to remove the lower gear shaft.