300 tdi viscous fan fell off

Hi all, i thought i'd better post in here as well to see if you 300 tdi owners can help.

i bought a disco last week and it has been running like a dream but today i got into it, fired up and pulled away a funny noise started then the battery light came on and i lost the power steering,
i pulled up expecting to see a broken belt only to find that my viscous fan unit was lying at the bottom of the radiator complete with the drive belt pulley to my horror!
the shaft that the pulley sits on has sheared at the timing cover
can anyone give me any advice please

thanks

buy a new water pump if I were you take your pulley and fan off what's left of the spiggot from the old part. transfer all this over to your new pump.