I don't know for sure, but I strongly suspect the powerfold mirrors use the same connector (C516, C622), but with pin 6 missing for the BLIS LED connection. You would need to get a spare connector/pigtail, or locate a Ford wiring kit that has the same pins, and then replace the glass with that used with BLIS and, of course, get hold of the LEDs. Those are a separate part with their own connector (C576). Note that this connector MUST be present inside your existing mirrors or you will need to add wiring for that as well.
It appears the BLIS LEDs are fed by pin 6 (from the SOD module) but get their ground from the Electrochromic Mirror circuit that is controlled by the inside rearview mirror. That appears to be why the inside rearview mirror is part of the circuit. If I'm right, there would be no need to replace the inside rearview mirror when adding BLIS -- just tap into the wire at pin 15 of C911.
So, I would not call this a "simple" upgrade but it's probably not as complicated as something like adding a heated steering wheel. Once the mirrors are configured for the LEDs (i.e. either swap the mirrors or replace the glass and install the LEDs), then you need to run a wire from each mirror to the inside rearview mirror, obtain and install the SOD modules (left and right) with all needed brackets and hardware, and run wires from each mirror back to the corresponding SOD module.
After that, there will inevitably be some FORScan program tweaks needed to "activate" the BLIS system and enable the controls in the instrument cluster to turn it on/off, etc.