I would love to see Wheeljack or Mirage, as the licence for the cars have also been hard to obtain...

But having said that I would be happy with Jazz, BB or Cliffjumper

The possible repaints
Jazz: Stepper & G2 Jazz
BB: Red BB, Bugbite, Glyph
CJ: Hupcap, Tapout, Yellow CJ
WheelJack: Slicer
Mirage: Clear Mirage