What about the new punk/trash bands as bludwulf and toxic holocaust ? Their lyrics might be too fictional but they still got that old and raw demo sound.
I haven't listened to them, but punk is dead. Punk remains dead. And we have killed it. It died with the onslaught of that gay 80's hair and glam metal; whatever was left of punk gave its last dying breath to thrash metal. (Thrash metal died too, and passed its energies to death metal.)
The bands you mention are probably what I like to call "recreational" bands. They came way after punk and thrash died, so they're milking a dead cow. Like Toxic Narcotic (the only one I've listened to).
I would recommend that you stay away from these, because they aren't as great as their progenitors.
Listen to this man:
The stuff that came after just combines these styles, but also has nothing important to say, like it's repeating ideas not just in form but in content.
Any band can emulate a sound, even the low-fi production style. But few bands are intelligent enough to convey brilliant ideas with a particular sound.