All functions could be wired without needing a wecan board.
It'll require a lil time and patience but it's possible.
For example. The T/A functions... Pickup at Whelen T/A led box, sorry forget the model number off the top of my head for your rear heads and rewire.
Cruise lights: there's a thread here about using diodes for cruise lights on a non wecan Liberty.
Low power: I believe is just a voltage drop to the LEDs, some type of systemic resistor for the bar should be effective. I haven't done the low power personally so someone else might chime in.
Definitely easy to accomplish the T/A and the cruise lights with a lil rewiring. And it's significantly cheaper than buying a wecan board.
Good Luck!
Seth