How do you deal with a non-tangible 3rd party item that you need to generate a req and PO?

Sometimes we customer orders that require us to purchase software items (non-tangible) from a supplier/3rd party. We set up the items as drop ship so that they create a requisition and PO because procurement needs to buy it from the supplier. The set up of the item signals the system that it's a physical item and needs a receipt done on it.

Any ideas on a process to get a PO to purchasing without a receipt needed? 2 Way isn't an option as it doesn't close the sales order line. I'm looking for a solution to a 3P item tied to the sales order.