Hmm... Reminds me of the time I found a beta map for Goldenrod...
I'm gonna go dig that out.
Edit: Okay, here it is, generated with Goldmap.
Notice that tiles 0x08 and 0x09 (the building roof) and 0x7E and 0x7F (the train tracks) are switched around compared to the final tileset, and that there is an exit to the west.
Start offset: 0x000A9D07
End offset: 0x000A9E6E