It's a long shot, but anyway.
Even single tracks would be appreciated.
In case you want something in return, just PM me.

Adherent (Pol) - Dawn And Dusk (1994, demo)
All Dies (Ukr) - All Dies ... But Something Remains (1996, demo) un
Anacreon (Fra) - Fear (1993, demo)
Anxiety (Fin) - (1993, demo) tr
Aphis (Aut) - Reduced To Nothingness (1992, demo)
Apostate (Ukr) - Consign To Oblivion (1995, demo)
Attempt To Life (Ger) - First Demo (1994, demo)
Autumn Embrace (US) - April Sun (1994, demo)
Autumnal (Fin) - Unborn Season (1993, demo) tr
Charnel God (Aut) - Recollection Of Charnel Thoughts (1993, demo)
Colder Thy Kiss (US) - Summer's Dying Twitch (1998, demo)
Crystal Illumination (Hol) - Illusion (1994, demo)
Cursed (Ger) - Dellamorte Dellamore (1995, demo)
Darklands (Swe) - Diablerie (1992, demo) tr
Dead Serenade (US) - A Passion We Once Knew (1994, demo)
Depths Of Oblivion (Ita) - Crimson Sails (1997, demo) tr
Dissenters (Pol) - Eternal Sleep (1997, demo)
Dissonance (Ltu) - Inhumanity Limit (1993, demo) un
Doom Snake Cult (US) - Advance Cassette (1990, demo) tr
Doom Snake Cult (US) - Caged Within Your Mind (1990, demo) tr
Dying In Tears (Ger) - Dance To The End (1994, demo)
Dystrophy (Ger) - Isolated By Myself (1992, demo)
Dystrophy (Ger) - As Nemesis Kissed The Sky (1993, demo)
Empathy (Swi) - Empathy (1996, demo) tr
Endless Dawn (Swe) - Hymns From Below (1992, demo) tr
Endtime (Bra) - Fate (1996, demo)
Eternal Silence (Ger) - Crying Of The Elements (1995, demo)
Glutton (US) - Cruel, Disfigured (1995, demo)
Incarnated (US) - Incarnated (1994, demo)
Inertia (US) - ... Please (1996, demo)
Messenger (Pol) - Przeznaczenie (1995, demo) tr
Mortify (Swi) - Mortify (1994, demo) tr
Mortuarium (Spa) - Demo 94 (1994, demo)
Mystic (Bra) - The Only Song (1996, demo)
Neurasthenia (Fin) - Demo 1995 (1995, demo)
Niobes Ivory Dream (Ger) - Emptiness (1996, demo)
Portrayal (Aus) - Eroticism Of Martyrdom (1994, EP)
Sacred Circle (Fin) - Demo 1996 (1996, demo)
Searing Orchard (UK) - Self Saviour (1991, demo)
Searing Orchard (UK) - Atmospheres (1993, demo)
Silent (Pol) - The Picture (1997, demo)
Silent Raven Fell (US) - Jade Flutes Of The Archangel (1995, demo)
Solemn (UK) – Poetstone (1993, demo)
Solemn Iniquity (US) - Solemn Iniquity (1995, demo)
Sub-Terran (US) - Wintress (1992, demo)
The Foreverlorn (Ger) - Fallen Queens (1996, demo)
Trinity (Ger) - In Heaven (1998, demo)
Urd Verdaine Og Skuld (Nor) - Urd Verdaine Og Skuld (1993, demo) tr
Withdrawn (US) - Withdrawn: October 1995 Release (1995, demo)

Searching in mp3:
Seol (Arg) - Seol (1997, demo)
Seraphim (Tur) - Sweet Words Of Sorrow (1998, demo)
Solstice (Hol) - Mors Omnia Vincit (1994, demo)
The Prior's Diary - Adorned (1997, demo)

Больше мело дет/дум, но все равно ищется полная демка

Touch Of Cruel Hands (Ger) - In Quest Of Redemption (1991, demo)

Symbolic Immortality - Venerate The Knowledge [demo] (1994)
Symbolic Immortality (Bra) - Perpetualis Sacrificalis (1995, demo)

Spiritual Ceremony - Visions [demo] (1994) (Thanks for Proteus_666 for the rip!)

Soulless - Promo Tape 94 [demo] (1994) (Many Thanks for Proteus_666 for the rip!)

Excellent old school doom/death

Pantheon - Throne Of The Gravity [demo] (1994) (Thanks for Proteus_666 for the rip!)

Bereavement - Our Hollow Death [demo] (1993) (Many Thanks for Proteus_666 for the rip!)

Классический дум/дэт. Даже соляки есть местами, медленные секции хороши, быстрые - несколько хаотичны.

Some PL influences. Searching in digital.

Seol (Arg) - Seol (1997, demo)
Vague doom/death from Argentina

Породистый риффовый дум/дэт, здесь уже начали местами отходить от канонов.

Solstice - Mors Omnia Vincit (1994, demo) (Many Thanks for Proteus_666 for the rip!)

German doom metal in the vein of Mirror of Deception