Purchasing suggestion for an item brought for delivery only?

Does any body know if its possible to get a Purchasing Suggestion for an
item brought for delivery only?

We need to buy some stickers, in order to deliver them with the product
we are making.
We are thinking of adding a Line to the Sales Order for the Stickers so
they can be delivered.
But how can we create the Purchasing Suggestion without going through
Production?

Thanks in advance
Sophie