Has the Zohar been reprinted in such a way where the pagination follows the old printing? Meaning, it is common to find myriads of editions that where printed in modern times, but I have found that they often do not follow any external systems of pagination. The specific one I am referring to 1558 Mantua edition, where there are three parts (Genesis, Exodus, Leviticus-Deuteronomy), which make use of two-sided numbering (1a;1b). See here
This edition contains inside of the text the pagination used by the old Zohar, f.e. chelek 2, daf nun amud Bet.