ED H's Hudson list above is very comprehensive and much appreciated. There is one entry that needs correction;
The #773 Hudson (6-38096) from PWC set 6-31739 has "Lionel Lines" not "New York Central" on its tender.
Part Number for the tender shell only is listed on lionelsupport.com as;
6918005T07
SHELL / TENDER / 'LIONEL LINES' / 700E