According to OP:
All my 3D stages can be found here: https://www.mediafire.com/folder/93jw53bve0pja/3D
Detailed release posts on MFG (requires login to view): https://mugenguild.com/forum/topics/supers-3d-stage-releases-198804.0.html
Mirrored links/stage previews also on my personal site: https://superfromnd.gitlab.io/ikemen-stages/