To the question about PRR, "Pennsylvania Rail Road", at one time the largest corporation in the country and one that managed to pay dividends thoughout the Great Depression.
On the E3 and related E2 PRR Atlantics, there have been none imported that I am aware of. Max Grey did a decent model in my opionion of the 4-4-0 1223 that can still be found quite often at O scale shows. I have one that I run regularly. I installed a DCC decoder. The famous PRR 10 wheeler - the G5 was done by Max Grey and possibly again by USH hobbies and definitely again by Sunset (before they added 3rd rail to the name). These are also quite common at O scale shows. Sunset also did an E6 and an H9 at the same time. Sunset 3RD Rail fairly recently redid the E6 (atlantic) in a factory painted version.
There are still some of us that buy steam models! However, less and less are being imported but previously owned ones are available in large numbers at O Scale Shows.
