Hey! Welcome to CEG!
To be honest with ya, I don't recall ANYONE on CEG purchasing one of the FEW CNG Contour's out there. I dunno if you tried searching for "CNG" of "Alternative Fuel Contour". The only thing I've come up with is just pics, lol.
Good luck with the auction... not that I am biased, but you will love the COntour more than a Cavy.
