PRR locomotive info wanted

I'm looking for info on a few ex PRR locomotives. I believe they are all scrapped by now. Also, any leads towards photos of said units would be very helpful.

PRR 5841/PRR4241/PC4241 (E7A)
PRR 2313/PC2313/CR2313 (GP35)
PRR 7901/PC 9051/CR 9355 (SW1200)

Thanks again,

Ryan

I found one photo of PRR 2313..anyone know the story behind this shot?

http://www.railfan.net/lists/listphoto. ... yTrain.jpg