If buying new rings, ford sell (or did anyway until recently you will have to check now) the same rings in nissan boxes quicker and cheaper, there aretwo different sets and the change over is in the middle of 'n' reg if that makes sense (regrdless of any face lifts head ligh changes etc.) so be sure to get the right ones.
Though I have found from experience (just like the rings infor above) that there is often a hub problem that makes the new rings a waste of money, insspect the edges of the hub casting for chips etc first, and for stifness in its action, there used to be downloads for a hub strip and clean and regrease, and for the ford / nissan part numbers for the 2 different sets of rings.
after saying all that i would (again from experience) bin them and get manuals, if your autos are working, then fine keep them, but I wouldn tspend money on brake rings as you may well be wasteing time, efort and cash. Just get the AVM's , job done!