I don't, but you are not alone. I'm reading about a lot of the older Simrad pilots starting to fail in one way or another, and people struggling to find second hand parts. If you can find a replacement it will surely be the least expensive way to get going again, but I would be worried about another failure coming shortly behind. You might want to start thinking about a full replacement sometime at your convenience, rather than under duress after another failure. You should be able to continue using the steering pump, and just replaced the computer and control panel(s), and probably the rudder position sensors. A compass upgrade to a full rate compass would be good too since you probably just have a fluxgate compass now that tells heading, but not rate of turn.