There are many ways to do this.
Can you give an example of what your actual use case is, that should help me give you a better answer?
The ItemVIews are usually spawned at runtime. So you'll want to get reference to them dynamically. This has to be done in script. You can get the ItemViewSlots from the ItemViewSlotContainer (InventoryGrid, Hotbar, etc..). Item View Slots are usually prespawned at edit time, so you can reference them directly.
And then you can get the ItemView from the ItemViewSlot.
In most cases though you shouldn't need to get a reference to an ItemViewModule. You would instead have a custom ItemViewModule that does the thing you want on its own.
I hope that makes sense.