Looking for Exhaust Manifolds 340 F Body

We have a customer in the shop with a 1978 Dodge Aspen with a '72 340 4 speed.He wants to get away from the headers and install factory type exhaust manifolds.I have been told a driver side manifold off a late 92-3 magnum is the best routeto go and a right side off of any 68-70 340 will work.Let em know what you might have.PM me here. Thanks