I realize that this may be a long shot, but is there a way to create a seam in a part? In other words break a part into 2 pieces when it's longer than the sheet stock that it will be cut from.
You can use a stretcher. For example if you have a cabinet that requires a wider/longer back than a piece of sheet stock. Replace the back with two stretchers or give the back an inset that will size it under the max sheet size and add a stretcher for the remaining opening.