I sing with the Unitarian Choir at First Unitarian Church in Portland, Oregon. From time to time I find, and make available, midi files and other items that the choir might find useful.
If you happen to be using a Linux system, you might look at "Rosegarden" as a midi player. If you find an alternative that you love, I would be interested in hearing about it.
If you find another shareware, freeware, or Open source midi player for Windows, please let me know and I'll include a link to it there.