MTH just announced 4 Railking scale Baldwin AS-616 diesels that will be released toward the end of the year.
SP, UP, B&LE, and C&NW. They are all avbl for pre-order on the website.
I've also put in a request to have a special run of Trona Railway. I'm hoping to hear back for MTH shortly, to see if its a go.
Its been busy here. Thanks!