Picking List by Planning Lines

We need to be able to ship individual pieces to the customer site before invoicing.  These are usually not inventory items, but one-of parts we have manufactured for a job.  There is a Picking List by Subjob but we wouldn't want to create a subjob for each piece we have to ship.  These are large structures that need to be shipped in pieces and then assembled at the customer site.  Has anyone done this or knows a way to do this?  We are still on NAV 2009.