We can rebuild it if you send it here, we can have it out and back to you the day after we reicieve it. We do not sell rebuild kits as I personally like to see what the actual problem was or is with the FMU and if I rebuild it I know it was done properly. It takes the end user out of the equation, I sent a new FMU out to a board member a few months ago, as a replacement be cause they thought it was a problem, I knew it wasn't but sent one anyways, turns out it was cam timing, The FMU was fine, feel free to send it back and I will tell you what is wrong with it and why, then I will send it back repaired,
Richard