Listed in the Blackgates Catalogue.
On my list of things to do after a 4″ LS traction engine so I checked availablitiy. They said, only a few weeks ago that they carry the castings as stock. Model Engineers Laser do a fair few laser cut parts too.
Labels and nameplates – try Diane Carney, who seems to have the production of photo etched scale nameplates very firmly under control. I’m sure if you said you wanted this or that from the class that is all she would need. (loco-nameplates.co.uk). She has just done a nameplate for a Metre Maid for me, and though a very simple job, it is perfect.