Hi Eddie..
I'm a Motorman for MTA NYC Subway for 4 years now and Own almost EVERY NYC Subway Set MTH has produced since 1998; Missing a few Lo-Vs, thats all... lol. I operate the D Train religiously for over 2 years now, and yes, the D Train stops at Yankee Stadium (Except Am Rush Hours to Manhattan and the PM Rush to 205 St When the Yanks are not at home) , B (weekday rush hours only) and the IRT 4 Train all stop at Yankee Stadium.
In terms of the MTH Subway Models, you have the following that mention Yankee Stadium as a station, but not as a destination:
Railking R-42 D Train w/ Proto 1 Only. Item -- http://mthtrains.com/30-2122-1
Premier DAP R-32 D Train. Item -- http://mthtrains.com/20-80005a
Railking R-62 # 4 Train. Item -- http://mthtrains.com/30-2671-1
Railking R-17 # 4 Train Subway Series RTR Set. Item -- http://mthtrains.com/30-4122-1
Railking R-142A # 4 Train. Item -- http://mthtrains.com/30-20191-1
Premier R-32 CC Train. Item -- http://mthtrains.com/20-20631-1
