I wrote this some time ago and it seems to work after converting to 4.24:
It does not have a ton of functionality but some variables are exposed. More can be added, of course. It does correct the pivot.
While it’s not precisely what you’re requesting, it does seem to have overlapping functionality. Do tell if you’re interested, I’ll zip the project and drop it on Google Drive. I could post script screenshots instead but it may be easier to reverse engineer it.
It’s using instanced static meshes so you can have a million of these (maybe). It was originally designed to stack items on shelves if my memory serves me right.