When you say you want the vector assets, I presume you want to edit them the way you would in Illustrator.
There is no way to do what you want except by placing them in Illustrator. You can't "convert" the Illustrator vectors into InDesign vectors.
Then you'd have to copy small groups of them from Illustrator into InDesign via the Clipboard. If you copy more than about 500 anchor points they will be converted into PDF which you can't edit.
You can create a library element from AI and use it in ID, but I would strongly recommend to save as AI file and place it as linked file.