Dear forum members 
I have been using a Raymarine SPX5 course computer to control a tiller drive unit for a good few years until this season the SPX5 board failed (it just failed to work this year , worked fine last year) . So now i dont have an autopilot when motoring. 
From my diagnosis of the problem and talking to the Raymarine service department, It seems the course computer board needs to be replaced. However,  Raymarine do not repair these anymore and also dont sell a replacement as they have been discontinued.
Raymarine have suggested i just go out and buy a whole new course computer and control head !
I was wondering if anyone out there had a spare / obsolete spx5 course computer that they would be willing to sell ? 
any suggestions of course would be great .

al the best

Peter Owens