I don't think that's very likely. From a design point of view, access to these upgrades are a facet of McCabe's design, so access to them will be restricted to McCabe.
If you have a henchman or minions that grant access to McCabes upgrades, how do you balance that? You either have people playing that faction that have access to McCabes upgrades for taking an OOK model, impacting the design space for the whole faction, or you restrict that ability to only available if McCabe is the leader, which makes it tricky to price that model in terms of cost, and restricts its usefulness to other masters.