VXOC Astra-J/GTC

Hi, 
I was wondering if anybody had any links for Spare Parts, Im looking for an Electric Water Pump, but can only find one with the main dealer, £380, which even the dealer thought was a bit steep.
Any help would be appreciated

If you want genuine parts.

https://www.autovaux.co.uk/
https://www.genuinepartsearch.co.uk/

Aftermarket parts

https://www.gsfcarparts.com/                      GSF have discounts of upto 60% (sign up emails) but their prices are higher to start but I've still managed to get some good deals.
https://www.eurocarparts.com/