Saving a pending print job as PDF

I printed an important receipt and quit Safari, only to learn the job never printed because we no longer own the network printer the computer was expecting to find. Thus, the only remaining copy of this information is in the print queue.

How do I salvage the information waiting to be printed so I can use it again?

Note: Dragging the enqueued item from the non-existant printer's queue to an existant printer's queue will print the item. I would like to know how to save the file waiting to be printed so it can be used again.