Allow mass PO Receipt processing for drop-ship orders

I have customers who do a large volume of drop shipping items to customers.

They want to be able to invoice directly from the PO to close the purchase order, or to be able to mass process purchase orders like you can with sales orders:

• Mass create purchase receipt (default to the PO line order qty)
• Mass release purchase receipt (this can already be done)

The preferred solution would be a check box on the stock item to not require PO receipt for the item if it is on a drop ship order. The workflow would behave like a nonstock item with the Receipt Required box unchecked.