You missed a Model 5 located here: https://maps.google.com/maps?q=40.21110 ... 1&t=h&z=20
There are also several Whelens at the New Cumberland Army Depot.
Over in Carlisle, there is an ATI located here: https://maps.google.com/maps?q=40.20557 ... 1&t=h&z=20
York Springs has a Sentry 10v located here: https://maps.google.com/maps?q=40.01062 ... 1&t=h&z=20