I have already tried that route and was promptly informed that filling out the form, posting it along with payment to the RPSI Dublin address was the only option.
If the second set are produced could Murphy models simply supply a brass etch that could be fitted over the relevant Windows by the modeller. It would keep the price similar and no one could expect Murphy to modify molds for just one coach.
Great to see a manufacturer being open to ideas, one of the advantages of having genuine modellers at the heart of it all.
I personally would prefer a RTR rake of fertiliser wagons than the plough. Rake of 10 "ferts" made to IRM standards would be awesome!