Wads/pk3s lost to time (Project Brutality related)

The two wads/pk3's I'm searching for are the Marines Full Force Demo and any versions of Dissension which pre-date v1.666. I discovered both of these while watching playthroughs with Project Brutality. Most of the links to either of these which I've found are no longer working, and I would be ever grateful if someone could help me find these wads.

Believe me, if I hadn't already scoured the internet searching for these I wouldn't be reaching out to folks here. Any leads are greatly appreciated.

If anybody else is has hit a brick wall in searching for some specific wads they've wanted to play, feel free to add info about what you're searching for as well, and perhaps we all can all find our missing maps together. Hasta luego