I have the raymarine 4000 MK2 autopilot and the back cover - part A18075 -  has the stubs that the support plate screws into have sheared off,   hence support plate not firmly attached and the unit works only intermittently.
I'm looking to see if anyone has a spare back cover,  or a place to buy one  (they are not supported by Raymarine any longer and i can find the occasional one in UK only for about $250.  

I suppose I can jury rig this by drilling a bolt through the cover and using a spacer secure the support plate in place,  a winter project for sure.

Just hoping there may be an old used system lying around,  Rest of the system seems to work ok,  just need that back cover.  

Any thoughts welcome!   Thanks, Bob Scott