Need Rear Brake Backing Plate Measurement

I have a '96 XJ with an 8.25 axle in it that I am planning to swap ZJ disc brakes onto. Does anyone have an old DRUM brake backing plate lying around that they can measure the center hole in? Instead of fumbling around trying to grind the ZJ backing plate holes larger by hand to fit my axle (I don't even own a Dremel), I'd prefer to have a machinist neighbor turn the holes out for me. All I need is the diameter measurement.

Thanks, but that write-up is a swap onto a D44 rear end.

The drum brake backing plate for a D44 is on the right. If someone could get me the center diameter and bolt spacing measurements from an 8.25" instead of a D44, I'd appreciate it.