I am looking at purchasing a Zodiac that was De-Registered by it's builder. This was back when there were some crashes but before the "upgrade" kit was available. The builder decided to sell but chose to de-register the plane before selling. They checked the box saying that the reason for dropping registration was that the plane was destroyed. It has been sitting in a the shop of a non-pilot for about 10 years. It is in really good shape and includes the wing upgrade kit. Here is my question:

How would I re-register it? I have been talking with our local FAA office but they can't seem to give me a clear answer.

Any help would be great!

Thanks