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
LEGO Railway Express Train 4561 Complete with Box and Instructions | #1834139601
Buy 4561 Trains 9V - Railway Express LEGO® Toys on the Store | Auctions | Best Deals at the Lowest Price