2 Da Street, Knobs R Gone
If your source de-registers the previous ignition switch key pairing to the ECU, you are good to go. Even at that, I think with the RED key you can simply pair it following the OEM info... FWIW the info is there and you might take a peak if you don't have it already. Link --->> Read Immobilizer section at pg 8 - 63 yep!
^^ Review of the FSM in the link says its non-issue to swap the ECUs as best I can tell. It walks you through how to initialize the ECU pairing the couple.<< SNIP >>
I didn't think about all those other locks that are keyed alike so, yeah, repair would be a win win! :rockon:
FWLIW - having held the ECU in my hand, it's not easily serviced. There are no screws or tabs to unlock and look. Although I could be mistaken as I never pulled the header out of the connector. Could be something in there but I doubt it.