That's a Quality1 extension to the BMW Eurogarantie I got when I bought the car. You can call/email them directly to find out whether they'll do one on the 964.
I did it for Violett (meanwhile I sold the 964)
Answer: "Unfortunately we cannot send you an offer since your car is classified as high risk car.
After many years of experience with these vehicles, these models have expensive damages and, for this reason, we cannot propose any warranty"
