You have two choices.
1. Do a complete Type Rating course and use the check ride as an ATP ride all in one. This way allows you to do it in a sim. You cannot do it in a sim without doing the type rating course.
2. Do it in an airplane. No training required, just find a 1900 to rent, go to the FAA web site and find out which examiners have 1900 type rating authority.
You may still be required to go through TSA background checks etc wichever way you do it.....option 2 may not be possible since the new TSA rules (???)
MJB