I was born 3 years after the 2J and i'm not one to glitch, so having seen it very early on when I really couldn't afford it, I waited, and waited, and waited some more for this car, always making sure I had 15 million in my pocket.
It did turn up eventually and is awesome fun (just watch it levitate/turn into a hovercraft on the straight at Trial Mountain!)
If the ticket doesn't work, keep checking your UCD making sure you never miss a refresh (I often grind the Dream Car Championship as it is the perfect 5 races long, with a championship bonus)
If you think you "need" it for the Historic event, well the Toyota 7 can win that relatively easily and is a prize car (or various other cars depending on ability!)
Bon chance!