sd33 power steering

hello, i have a series 3 with a nissan sd33 engine and box. it also has powered steering fitted which unfortunately is leaky as bejaysis and looks like the box needs replacing. the pump is nissan, not sure what the box is though so i was hoping some of you good people could shed some light on what it most likely is and what the best replacement would be...

thanks

pictures please dude (of the box)

Does it look like this one?
Power Steering Box. 1992 Nissan Patrol Y60 4.2 Diesel. Safari. | eBay