Hi, Ryan!This is Margaret (SP fan), using Daniel's log-in. (He is my son, from whom I caught the railfan "bug" around 25 years ago!)
To borrow videotapes that would have what you want for your musical, please check with the National Railway Historical Society:
http://www.nrhs.com
They have an extensive video library, and will rent videos to NRHS chapters and bona fide organizations, not individuals. Some NRHS chapters also have video libraries, and will rent videos to individuals. I am pretty sure that the NRHS National WILL let you rent videos, if they are rented to your SCHOOL.
Good luck, and I am sure your musical will be GREAT! (Wish I could see it!)
Margaret
P.S.: Please let us all know what you found, and how the musical went! :-)