You might ask in the Model Railroader General discussion forum but I will answer anyway.
The Bowser site seems to show a cab floor with two seats.
Probably have to make your own.
Curious. Did you pick up a junker?
http://www.bowser-trains.com/docs/instructions/B-6%20Instructions.pdf
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.