This parts issues has been an ongoing problem. Bob used to complain that even if he called Lionel, although most orders were over the internet, he had a hard time getting parts. I remember being in his workshop and there were numerous engines from a number of shops waiting for parts so he could repair them. Some in warranty and some out of warranty.
Many times he had to give his customers the bad news that parts are not and will not be available for recent production especially some of the least expensive engines. These owners basically have nothing more than an expensive door stop.