I found a copy of the original 04-028 and it provided the exact part numbers of the replacement/upgraded BCM/MCM, which is what I was looking for. I just replaced the IMA subpacks with Civic subpacks which makes it a "new" battery, so I felt it prudent to upgrade the IMA management software as well. I found the upgraded computer modules at an Internet salvage yard; they may not be the absolute latest and greatest, but they are dated from 2004 and are specified as the fix for the original failed IMAs, which should be a vast improvement over the original 2000 computer modules (which my car still had).
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