Mazda 787b
Audi R10
Peugeot 908 (I think)
These are ''Le Mans'' cars that can be purchsed from their relevant dealers in the New Dealership.
As mentioned above, all the GT1 cars I have seen (Toyota GT1, Nissan R390 GT1, BMW F1 GTR, Nomad Diablo GT1) all have to be purchased through the used dealerhsip, whenever they appear there??
You could try putting an advert up in the TRADE marketplace section of this forum, or looking at the adverts already in there??