I do have some pictures, but honestly they're not very interesting.
Here's a link to the album:
https://photos.app.goo.gl/Wj54xdAKZSp91rPv7
There's comments on the photos.
I found it frustrating how little information was out there on the exact dimensions of parts. I think for other brands like Honda you can get diagrams with dimensions for just about everything (don't quote me on that, but I have seen a lot more info). But I did look at some WQ parts and I think they would fit. I believe the rear brake pads I use are XR4/WQ pads (the Calipers are the Lucas ones, the Fiesta ST's have two different brands of rear calipers apparently).
The easiest way if you have the space to do so would be to get a whole parts car. I definitely don't have the space for that though.
WS parts are hard to get - and a lot of the ones from the UK are rusted to hell. I trolled through Google and found a place in Victoria for the front knuckles/hubs. I spent at least two weeks looking for WS wheels and found a guy who had some in average condition in Melbourne (the FB Marketplace seller really came through for me though!).