pipe wrench/monkey wrench? can you machine or grind flats into the nuts to get a spanner onto them? I'm not lookig at my bike at the minute, but assuming you mean the top nut in the top of the forks?
Yup, that's the ones. I considered filing the flats as I don't wanna go down the stilsons route just yet but the metal seems so damn soft and the hex is small to start will.
You really want a hex spanner to spread the loads a little more than open end jobbies as they have O ring seals do not have to be too tight try to clean up the damaged hexagon to fit a spanner or make a spanner from 4 or 5mm plate
John