Ok. Your explanation is great. You will need to write a Crystal Report and link the SOP sales items (work or history) to the BOM Header table (BOM00101) by Item Number. Where there is a match, the sales item has a BOM and those lines are the ones you are looking for.
Use the SOP10200 (work) table for items currently on sales orders. These are items that may need to be built.
Use the SOP30200 (history) table for items already invoiced to see what was already built.