Have deinotely seen and noticed the lack of both. MTH ‘s last set was pre 2010, IRC, and possibly not since the 2002 catalog!
The k-line 5 car sets pop up on eBay more often- less than 200 which is pretty good. The two car sets, which can be combined to make a 5 car set, show up even more often. Contrary to what I believe is popular belief, the two car sets are scale and support scale sized K-Line containers and modified MTH and Weaver containers. They support scale sizes of either: one 40’ container, one 48’ container, 2 20’ container, 2 ISO container’s on Trailer with 40’ container. Can provide pics if you’d like. Hope that helps.
Steve- I'll take those pics and I did find the early reference to the "kit-bashed" 48's (https://ogrforum.ogaugerr.com/...ermodal-husky-stacks). Anthony