HOn30 PUP Boiler
HOn30 PUP Cab
HOn30 PUP 1890s Accessories
Yes, it's 3 separate files, that is to ensure ease of assembly, and modularity, as more versions of parts and accessories are planned to be released. All total, before shipping the model will cost $50.05, which is quite reasonable if you consider the alternative options of trying to either a) scratchbuild one, or b) find a Joe Works Brass model on the second hand market.
To order the Imon PU-101 Chassis, Toma Model Works of Japan sells them on their English friendly Website at this link: Toma Model Works