I am wondering if anyone can help me.
I am after the clips that hold the moulds that are on the bottom of the windows for the rear cargo bay.
The clips slide into the moulds and have little rubbers that stop the water from getting into the cargo bay.
Any advice would be appreciated.

Try and get some from a self serve wreckers, including some spare weatherstrips.
Because the fasteners are like a spear barb type thing, they'll mostly break/deform when removed.
A replacement for the rubbers you can try is the stick on door weatherstrip type stuff, cut a piece and use a holepunch for the holes, smear with silastic and fit.
I found it works well, particularly for the side strips, as the front clips leak water which finds it's way into the front of the rear wheel wells.