If you start from your Inventory Item List, you can force this report:

1.) Choose any item, and right click.  Select "Quick Report" near the bottom of the list.  Then, Customize Report using the Filter Tab:

2) Type "Item", then scroll to the top of your item list and select "Add Multiple Items".  Choose the items for your report.

3) Type "Transaction Type" and select "Multiple Transaction Types", then select "Build Assembly".

Hope this helps!