The link AK posted has 15" by 96" that could be cut down and used as a "pair" in a french double type configuration...but building and installing a custom "jamb" assembly to hand this pair may put your cost up above a truly custom "pre-hung". Most "paint" grade louver doors are pine, the so the cost of the Mahogany above may not be needed. Framing the opening down to take a stand 80" high door may help too.