Tomorrow I'll be working on the inner mold master for the rear door, so I'm posting my preliminary component layout design for comments.
I've laid out the parts to accept a "Mighty Wiper" from Pacific Western Design (
www.pacificwesterndesign.com); it's a very small and light motor that will fit well in the door upper. It is compatible with the factory TJ hardtop wiper wiring.
A nozzle for the rear window washer would be mounted on the rear wall of the hardtop, not on the door. it would be above and inboard of the rear opera window on the driver's side, and a short hose extension is all that would be required to connect it to the factory hardtop washer hose. I haven't sourced a nozzle yet.
For pre-2003 Jeeps that do not have venting in the tailgate, there will be a series of louvers on the inside of the door, feeding an external vent. The vent is from a second-generation Chevy S-10; unfortunately the 2003 and later factory Jeep tailgate vent is too large to fit in this door.
And there's also a location where 4" speakers could be mounted, although I'm not sure many people would be interested in mounting speakers there.
I'm not sure what, if any of these features would be "factory installed" by the company, but in the event the company decided not to offer the features they could be installed by the Jeep owner.
The drawing shows the location of the mounting hardware for using the door in the barn door configuration, but all of the above features could also be used in the liftgate configuration.
And I've posted the below drawing before, but I'm including it in this post again for reference. It doesn't show all the detail of the above drawing.