Sure, here is the file:

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I'm not sure if one of the 100 other things I tried before that last file did anything in the process. Or if it only works on original fenixes, not Deltas.

I'm afraid if that doesn't work now, I'm out of ideas. I'd probably have to experiment with a real D2 Delta to find a way then. But AFAIK, Garmin will release the 4.00 update for the D2 Delta soon. That should bring the newer bootloader with which you can easily flash the other firmware.