X-ray began its life as a white Turbo T.
When the GNX project closed at 547 there were parts left at ASC so Rick (last name omitted for privacy) who had worked the line and helped with the first two GNX's took the leftover parts and put them on his T, transforming it into X-ray.
He even fabricated the X-Ray badge
GMP modeled their 1:18th off of his car.
I have quite a few picts of Rick's car. Let me gather some and post.