It's hard to find most of their CDs but I got this reasonably priced off of Amazon. I'll def try to track down the others as I agree I should listen to them more.Glad to see you listening to more The Chasm. That album fucking rules and is my second favourite from them. Their most aggressive and violent release, but still keeps the otherworldly atmosphere and top notch song writing.
Listen to Conjuration of the Spectral Empire next if you haven't.