Thanks mate. I ordered all of the replaceable bits. Main glass seal, washer jet, the hose, the hose end and a couple of other bits.
I think I know why your friend replaced the motor. The washer jet pushes into a plastic tube that goes through the motor and known to leak. And guess what? That plastic tube is only available as part of the entire assembly, soi I may end up doing the same if these bits don't fix it.