I also have a Roland SC-88 I could record Doom MIDIs off of if we wanted really good quality music or something.
There's quite a bunch of SC-55 and 88 recordings of Doom and Doom 2 actually, but there's one that I couldn't find - something that has the reverb and chorus settings turned up. I had mp3 recordings of those maybe 20 years ago, but I had to delete them due to space issues, and I couldn't find anything like those ever since. All the recordings made are "pure" with the effects turned down.