looking around, apparently Powertrain Control Solutions can reprogram their controller to work with the 545rfe, but that thread was from a couple years ago.

It looks like the 545rfe has 7 solenoids to control, which makes it that much more complicated. Again, looks like someone is working on a MS solution, but then you'd have to piece together MS hardware and find the right software.

I'll probably start with the RE, and see if there's enough demand after that.