Broken bracket for power button?

I was using this guide iPhone 4 Versorgungs-/Sensorkabel austauschen to replace the power & sensor cable and step 24 did not state that there were two screws holding the button bracket in place. Thinking it was a press fit, I broke the bracket that is swapped onto the new cable in step 27. Does anyone know a source for this bracket? This is a disappointing turn in an otherwise great guide on an otherwise great site.