Disco 2 V8

Afternoon Gents, don't post here much as usually over in the RR section but I have a problem with my 04 V8 Disco and need some expert advice, it needs a new viscous fan but I am not sure if a PO has fitted one from something else possibly a P38 RR? , searching part numbers the common one is ERR 4996 for a V8 Disco which is just the clutch ass, the one on my Disco is PGG 000080 and a complete unit with fan? question is what is the right one for this engine?

This may or not help. http://www.allbrit.de/UNI.cfm?PAGE=816841&SPRACHE=EN

the part number ERR4960 was superseded by PGG000080 that's all, the unit is the same

Thanks for the help and clarification, water pump now also gone it never ends................