Well, since these brakes aren't even close to most, and it would be a one-off, I'd have to measure, blueprint, and machine one, then test fit it. Assuming it fit, I'd have to make a casting of it, then a sand mold, then a metal casting. Then I'd have to do the same for the other side. At that point, only the front is done. Then all those same steps for the back.
On top of that, I don't have a forge here, so I'd have to have the sand molds and castings done at a foundry. Then, once done, I'd have to X-ray them for imperfections for liability, and anodize them for corrosion (assuming they're aluminum alloy).
On top of all that, I'd either have to design them for a pre-existing pad, or make new pads.
I think you can see where this is going.