Can we get a spot on work orders/requests to put a PO number?

When we have people putting in work orders for deliveries PO numbers are getting lost in the chaos of all the other information. Having a seperate field to put a PO number in would be super helpful because we could then have the POs field as it's own column and easily search. I know PO is listed in "transactions", but that information isn't available for a column. I really need this visible in list format.