As for feeling sorry for Trainorama Why ?I don't think its entirely Trainorama's fault that they haven't managed to get the 45/600 released before now. I'm sure it wasn't their intention for this delay! They have done the right thing and are indeed concentrating on getting the GM's & 48's done, don't forget not only did they lose the factory they were using but they have also had their own change at the helm.
They have had years to produce a 45/600 and have not.
The best thing for Trainorama to do is to concentrate on delivering 48 and GM locos that we have been waiting years for.
At least with Auscision we know we will see the loco.
I note that the big four Manufacturers Auscision.Austrains,Eureka and Trainorama have not produced a single QLD Loco or item of rolling stock which indicates to me they have little faith in making a return on the investment required to produce such models.
Good luck to SRM with their first QR loco and I hope it sells well for them.
Re why no one has done QR models as yet, well it's pretty clear that Austrains don't take risks, so they were never going to produce a QR loco when no one else had yet done so. Trainorama are busy getting the aforementioned models done so who knows what they may consider in the future. Eureka are concentrating on mostly NSW steam with the odd VR steam era models so again they are not likely to change their market. No, the only other company likely to produce QR outline other than the two who do currently, is Auscision, and I have no doubt that whilst they have said that they are not going to at this time, I'm sure they are watching things very closely.
Re Auscision and the 600's, I'd hazard a guess that they are ascertaining the potential of a 600 right now, of which the amount of comments online in various places will give them some indication, along with I daresay people emailing them and indicating what they want. Personally I'd be quite surprised if they don't do them, but if they do, I'm very sure there won't be many made.