I ran into the exact same situation when Daz remote tuned my car. It's how I found out mine had an MTM chipped ecu & tcu. Fortunately at the time he had one on his shelf he sent to me.
I don't have anything else to offer for identification other than a picture of my MTM chip. I would bet your easiest solution out of those options is to try sourcing a used one. Hit up all the part outs.
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