I'm afraid I'm an interloper as I'll be building a Eurofox but there are similarities and I enjoy reading the ideas and great designs in this very active forum. Eurofox do weld little lugs onto the frame and then you can bolt the servo bracket to those lugs. I only discovered this option recently and I am very pleased about it as I thought I would be making plates etc. This bit of kit means the servos are mounted in the right place and very securely
I cannot say I have seen factory plates for the Kitfox and I have been reading the posts on autopilots and servos. All the examples I've seen so far have been guys with Dynon or Garmin but they all do the same thing, in the same way, so I'm quite sure it would be a fairly easy thing to 'replicate' (that's my nice way of saying 'blatantly steal their idea'). Hopefully for you the factory do produce servo plates and the mounting lugs but I'm sure it's just a matter of a quick phone call.
Here's what Eurofox are doing