Looking at their website part numbers ending with 'P' are described as aftermarket which says 'pattern part' to me.
Those with 'P1' ending are described as by an OEM maker.
Land Rover ones are described as 'genuine' & I'd expect them to be in a LR logo'd bag or box.
Be interesting to know what impeller type would be on a genuine LR dealer supplied item. Assuming it wasn't something in a blue box....
I did read on one of the BMW parts sites that early ones on the BMWs were plastic & disastrous & subsequent ones were a composite material. Metal ones also available but not as genuine or OEM parts.
They will only be in a Land rover box after being taken out of the container from China and put in one.