V3 vs v4 3DP build part list

The current size is 200^3 with a little extra room.

Q: build plate support that connects to the 3 motors:

Forgive the question if I have simply overlooked the obvious information. I have seen pictures including it, but not a drawing. It doesn’t show as an item in the shop either. Is that a piece I need to draw or export from the fusion setup? Is there a recommended material for it?

edit: updated docs. answer is there now