No. There was no "unit". This was before the days of modular PC PSUs and switching wall warts (which started proliferating only later). So it was just a custom circuit that used commodity components. For these components, orders from Apple would have been tiny compared to the overall market demand.
What an excellent example of Brandolini's law: “ The amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it.”
(2012, 246 points, 74 comments) https://news.ycombinator.com/item?id=3636047
(2013, 170 points, 63 comments) https://news.ycombinator.com/item?id=6575994
(2021, 208 points, 158 comments) https://news.ycombinator.com/item?id=28700554