What do you have? Hoping to build a longer train.
41040
40045
40049
42040
43040
44040
45040
46040
Four or five on eBay right now. They are still spendy. Lionel Large scale made one that is similar, but less money. So did USA trains at one time. I run all three together on my ore train. (But most are the LGB models.)
Reference only:
https://www.onlytrains.com/model/trains/R14204.html
For less detail, you can find MDC or Piko.