Initially I thought the same Chris, until the same thing is true for the recent PS3 version. I guess no rhyme or reason as they do show parts for some early 90’s PS1’s. I will search the net but don’t know the names of the parts. One body part is at the left side bottom rear boiler, low towards the track (brake cylinder?). Also the rubber hose that connects it to the rear truck. The other part is the (tach strip?) that glues to the motor flywheel.
if anyone knows the actual names for these, I can do more searching.
Rich