Circling back on this after half a year.
For future readers, please do NOT get the Logisys PSU mentioned above as a replacement. I am seeing some issues on my IIcis that are using this ATX PSU. Although on paper, the specs seem ok, in practice in a IIci with multiple Nubus cards and an accelerator, I'm seeing voltage issues. I am not sure what I'm going to replace it with at this point, but just wanted to add this courtesy note to not get this particular PSU as a replacement.