Here is a Shape Viewer screenshot of the next version of my Silverliners:

Note that the details are different than the PRR Silverliners to reflect some of the modifications made by the time of the Penn Central merger. Also, the road markings reflect some of the different variations seen during the Penn Central era. These are new car numbers, not represented in the PRR or SEPTA sets. The cars shown are only the low number series, the high number series is also planned.