1987 Cadillac Allante headlights for German approval

Hello dear forum, I have a Cadillac Allante from 1987; but at present still without German approval. For the full acceptance I need in Germany approved headlights, which, to my knowledge, never existed for the Allante / nowhere. I was told that the only possibility for this is a light technical report (four digits). Is there no other alternative? Does any of you have an idea / experience with the Allante in this respect and can I use it I would be very grateful to you for your help! Marc