Rare G&D MDC Shay on ebay - other resources
Jeffrey L Witt
These kits do take a lot of work to run well...
NWSL is back and has two separate re-gear kits:
Another issue is the power pickup wipers; they need to be improved and hard-wired.
There are also other items on EBay to modify them:
This seller has 3-D printed trucks, cabs, and tenders: