Pat... these are hard to come by. You might have better luck getting a PRR BB-1 which both MTH (Premier, PS 3) and Lionel (TMCC) made. The MTH BB-1 version looks stunning.
I'm trying to focus my motive power on engines that operated in PA (PRR of course, Erie, LV, Reading etc.) and since DD-1 were originally PRR, then sold to Long Island later, and because of the keystone on the front, I figured it was fair game.
Now I need to build my "milk car" consist, but that'll be the topic of a separate posting.