Ok so about a year ago there was a mod for gta sa containing 4 DeLoreans, I have googled and found none
Basically it was a modified version of what we have today,
Press 1 to Spawn bttf 1
2 for bttf 2
3 for btt3
4 for bananas
They had a sort of high res texture
If you know of this mod/creator please link me to it (only with permission pls )