M2 Ground Pounders Sublime Green 1:18 Dodge Challenger

I purchased a 1970 Dodge Challenger R/T Ground Pounder made by M2 with the blown engine and all in the sublime green and I bought it loose (without a box) so I have no info on it at all. I know the in the orange, they only made 300 pieces, the black and the white they made 500 pieces, but I have looked the internet over from one end to the other and have not found one green one yet, I even emailed the largest wholesaler of diecast cars and they said they have never seen the car before.  I emailed M2 nd they have not returned my email.  Has anyone got a clue what I have here?  I don't know how to add pics.  Well it did do one of them.