I have just placed an Ebay advert for my 737ng Autopilot.
It comprises of the following items:-
Hispapanels :- 737ng panel and push buttons
Opencockpits Master Card
Open cockpits Display Card
Open Cockpits Seven Segment Displays (All wired up except Vert Speed & 1st officers. Just needs to be wired to another display card from opencockpits).
All Rotary encoders fitted except VS and 1st officers
LED`s fitted and wired up.
Can supply the SIOC code written for use with Simavionics.

As can be seen you may want to rewire as it looks a bit like spaghetti junction. However it all worked fine last time I used it.

Happy Bidding