Here is an additional collection of unreleased 4-track demos. Eugene Saunders was in the band at this point playing guitar. Not sure if Eugene or Patrick were moving to organ for some of the tracks. While certainly not the best recorded, this is how I remember the band sounding.
Black Dahlias 4-Track Demos (1991)
1. Everywhere I Go
2. Topsy Jane
3. Radio Shades
4. I'm Not Invisible
6. Santa Monica
I know a ton of live material and video footage exists. I'll try and raid the Patrick Yonally archives soon.