I have tried tapping some German sources…but with limited luck, as my German is not the best.

But even there I run into the same melding of Celtic/German to the point that you can hardly tell who is who. It is such a cloudy time and moving people leave little record of a material culture. I think that most of what we have is more educated guess work than conclusive evidence of who was where, let alone what they had.

The easiest place to start might be with Gothland…we know where they came from and should have some indication what their material culture was around the time they started to move, especially since not everyone left…