Chicago Metropolitan Jazz Orchestra
For many of Jim's (and many other arrangers and composers) charts: University of Northern Colorado Jazz Press http://arts.unco.edu/uncjazz/jazzpress.html
For other great music for big band and other ensembles: Advance Music http://www.advancemusic.com/
The big band composing/arranging workshop in NYC for which Jim is musical director: BMI Jazz Composers' Workshop http://www.bmi.com/about/workshops/jazz.asp