Thanks for pointing out another supplier and another vote for switching PS.
CNCrouterparts 380oz-in: 3.15V, 3.5A/phase,4.1mH
Kelling KL23H2100-35-4B 381oz-in: 2.55V, 3.5A/phase, 2.8mH
Anything to worry about with the higher inductance in the cncrouterparts motor? The G540 manual states that inductance should be between 2.5mH and 3mH if maximum power is required which I'm not sure it is here.