I could be wrong but I have never seen a picture or any sort of documentation of the M4A3 E2 being used in Korea. Only 254 were built and shipped to Europe with the intent of them being used as an assault tank. A large number of the Shermans that served in Korea came out of stock that was being held in Japan after W.W.II, where the Jumbo never saw service. These stocks consisted mostly of the M4A3 E8 which did indeed serve in Korea.
Happy Modelling and God Bless
Robert