I think I found it, but not in any of the ways suggested. I had an old Demon laying around, and I stuck that in. I had at one point put an A8 in it, but that's way too modern sounding. I realized that and swapped in an extra A2, added a bit of gain and bass and rolled off the volume a bit. Bingo.
For what it's worth, the Demon has phenomenal clarity under very heavy gain. I had forgotten that. I think I'll try to stick with this one for a while.
