Seeking info about the GTW S-3 and O-19 classes


ignore user, GTW foamer
Hello everybody!
As a part of some potential kitbashes, I am seeking information regarding the GTW S-3 class of light mikados and O-19 class of 0-6-0's. I am in need of any info- numbering series, accessories+appliances, upgrades/modifications, everything and anything. If these are released, anyone who provides info will be credited.