am searching for postwar (conventional) units any help is appreciated!
As far as I know the only 3 rail conventional 1:48 proportion E8s were done by Weaver in the early 90's which became the basis for the MTH ones. Do you have a specific road name in mind? I have an A-A Amtrak set in Phase II paint I plan on selling sometime. I'm keeping the B unit and lowering for use with my 3rd Rail E8s.
I also believe that MTH offered the Railking E8s in conventional as well. That or you could find a Protosounds version and put a simple reversing board in it.
MTH Premier. https://www.mthtrains.com/20-2206-1
MTH RailKing line or ProtoSound 1 locomotives would be your best bet. Unfortunately, Lionel never made E8s in the postwar period.
I have an MTH E8 NYC ABA set 20-2317; it's PS-2. New in box as purchased.