Once the cars painted and I have some money to spend on my 280zx struts Im getting a wilwood brake package from the US. Its got the 4spot superlites, new rotors and rotor hubs to suit, costs about $600 all up though. They have a dogbone bracket as well to adapt the calipers.

You'll find you wont get them to just bolt on and even if you do get some to bolt up, without the bracket to move them away from the hub they will too close to the hub to get a large disc on there.