These Sn3 Scale Series kits provide the side and end walls, a frame, and decals for several of the DSP&P passenger cars. These kits require ordering the appropriate Sn3 roof from Shapeways, as well as End Beam/Rails, Steps, and under carriage detail parts. Kits are less couplers and trucks.
(Yes, the photos show HO trucks, that was all I had available at the time.)
DRL-S-D7 $46.00 DSP&P Baggage #40, #41, #47 34' body The Shapeways roof for baggage car #40 is at: shapeways1.
DRL-S-D3 $46.00 DSP&P Coach #3/#5 40' body The Shapeways roofs for coaches #3 and #4 are at: shapeways2.