I was able to make up a few wrenches to fit the packing nut (2") and the lock nut (1 7/8"). We have a waterjet a work and I programmed to cut them out of 1/4 stainless steel.
It's the strangest thing, on both nuts only 2 sets of the sides are the same and one is smaller so the wrench fits snug on 2 of the three sides and lose on one side. Does anyone have any idea of why that would be?
I also cut my packing and inserted that into the nut.