Help me identify pas pump

Hia all I am new to land rovers and this is my first one,could someone please tell the right part num for a power steering pump on my defender90 engine please. It is a 1990 200tdi, am I right in thinking this is the disco engine in mine as the bearings in the pump are whining so I would like to replace it , included a few photos, any help appreciated, thank you

This might help you in your search.
http://allbrit.de/UNI.cfm?PAGE=747976&SPRACHE=EN

Cheers

It's a disco engine , yes.

Disco page is this one....
http://allbrit.de/UNI.cfm?PAGE=800685&SPRACHE=EN

Cheers

Thanks that's a great help gonna get it from island4x4 as not far from me,
So the part number is ntc 8288
Didn't wanna get the wrong one