"I was hoping NKP Car Co would make them but they seem to have dropped out of the N scale market completely."
As Charlie Vlk could tell you the NKP Car Co. of today bears little resemblance to the earlier incarnation, which had done both a decent assortment of C&O and NKP car sides. The current company won't even consider doing anything "N" even though there likely is a swelling market that they would find if they bothered to look that would be interested in many of their offerings.
Even the so called revival of the C&O cars was never posted on their website but was done as much to try to justify themselves in regards to "N"... "Well we offered them and nobody bought them so why bother" sort of mentality. It took several email attempts just to find out what car sides were available and he never wrote me back to tell me the price of the sides.
But there might be another source to consider. M&R Models might do more in regards to mid-western and eastern lines if there was enough interest expressed. And
Roberto will also do custom runs for individuals, though they would have to bear the cost up front and wait roughly six months. Honestly not sure if you have to do the development of the etchings yourself or if he would do it for you nor do I know how much more that would cost.
