After looking for three years I finally came across a Martin Baker MK4 ejection seat that I will use to make the Nav Chair inside the Falcon.
The same seats are also located in the cockpit behind Han and Chewi's seats.
I'm looking forward to this project, which I plan to start on next year.
I don't think it will be too tough and if anyone has any ideas of what to use for the round base on the chair or anything else - let me know.
Also - please post good reference photos.