Angelic Echos is created with a delay in parallel with a pitchshifter > reverb. Using plug-ins, you should be able to achieve something similar if you setup 2 send/return tracks. On the first track use Ultratap for the delay, and on the 2nd use ShimmerVerb for the pitchshifter + reverb. Bus the track you want to process to both send/return tracks and mix to taste and that should get you started for creating a similar effect.
Sorry to hear about your DSP7000. If you are ever in the market for another rackmount unit, the H9000 does have the 'Angelic Echos' algorithm.