Here is a used, but working, Flightcom panel-mounted intercom. I found that it wasn't well-suited for our extremely-noisy airplane, and replaced it with another brand. It should work fine in any normally-noisy airplane. Since it was a swap, I reused my old jacks, so I'm only selling the intercom "box" and faceplate. I'll also include some of the little face plates that Flightcom supplies to go where the jacks are mounted. I think I have about four of those all together. This would be a good spare for someone who is already running the 403b. Price of $40 includes shipping in the US.