Sounds great. But I for one am sick of the multi packs. I probably couldn't justify several TRCs on my little layout & would be prepared to pay a higher unit price if they could be made available as individual items as well.
This has been talked about over the years, with many likewise wanting single packs, even double packs yet when it comes to brake vans even the double packs can be seen as problematic as like you in this case may only want one of them.
With the exception of some wagons I have noticed a slight drop down from the old 4 packs to a 3 pack as being more common, & nearly the norm now, even in most 4 wheel vehicles, given I believe that things are getting tighter for many modellers given the flow of R/S items I would like to see more double packs in the R/S area though, I am not sure if it adds a lot to the overall costs for the various producers but again the situation may come where a model is released in smaller packs at a price seen too high & the reverse would take place calling for discounts if it means buying multiples to get the amount wanted, I have seen that also.
In my layout planning, I have sat down & worked out how many trains I will be operating, & while I have a largish layout compared to some but small compared to others, this includes trains in staging yards, & other locations around the layout, likewise working out the maximum length of the trains which will run. Including in that list are specific train types, which include fast goods, & general goods working, I also stick very much to a tight era to model & only buy models that ran within that period.
By reading what OTM have said regarding not doing the NRY ref cars, which is totally understandable given that they were not that much of an advancement on the TRC's having these wagons in multi packs does make sense if they come in 3 packs. Given that every line, except the Illawarra/South coast line had meat & fruit expresses up until the end of steam & fairly well into the 70's/early 80's up to when the Homebush Abatoirs & Darling Harbour facilities were closed down, the TRC & MRC vans provided the bulk of the wagons used on those services.
Even on a small layout, a dedicated meat exp, in both empty & full configuration comprising TRC, & MRC's & Brake van would not be out of place.
Other than that I am sure that many modellers out there would buy any surplus from you or swap with something else, I have several modelling friends that I do that with.