Alrighty, finally got through to the parts department at the local dealership and got some part numbers for the connectors. They are available, even if they're not terribly inexpensive.

RE 8 Pin - 5183475AB ~$45 online
RFE 23 Pin - 5102403AA ~$100 online

Another question:
How would you like to have control over the governor pressure? I could use a 12x12 table with Speed and Load as inputs, and the governor pressure as the output. Then, at higher loads the governor pressure can be increased to raise the shift points. At lower loads the pressure is lower allowing shifts sooner. Then you just tweak the values in the table to suit your needs.

Or, I could have a simple mapping of speed to governor pressure.