Mysterium Fidei gabc

I've searched Gregobase for the memorial acclamation "Mortem Tuam" but find nothing. Before I attempt to input it myself, I wondered if anyone might already have it in gabc.

Here is a screen shot from the current PDF file that I have (note: there is a mistake in the right-side 'mysterium fidei'), but what I really need is the code so that I can render it differently for a worship resource I am making for our schoolchildren.

Thanks in advance!
Fr Jerabek