Railway Express with Transformer and Speed Regulator : Set 4561-1 | BrickLink
LEGO 4561 Railway Express with Transformer and Speed Regulator Set Parts Inventory and Instructions - LEGO Reference Guide
Amazon.com: VERY RARE: Lego Railway Express Train Set w/ Transformer : Toys & Games
Finally found 4561 Railway Express for an ok price at the thrift store. It even included 10014 Caboose as a bonus. So far it's looks mostly all there. : r/LEGOtrains