Ben,
Sorry, but we are limited to what is being supplied by Freeware developers for FSX at the moment it is not something we can just bolt on or add to the aircraft ourselves. There are very few Airliners that are complete with Virtual Cockpits for FSX yet.
I don't understand why FSX is is "essentially unflyable" with a 2D panel? Using the 3D Virtual cockpits have a massive hit on frame rates on FSX. To prove this, press [SHIFT] [Z] to bring up the FPS data and try the default 737-800 with the virtual cockpit, then switch to 2d view. I get on average 7-8 FPS better performance with the 2d panel. Also, please remember that the default aircraft use very basic cockpits also, once you start adding 3rd party features and guages, these frame rates will slow even more.