BRAVO! Your effort in this area is greatly appreciated!
There used to be a publisher named Kendor here in New York, that published hundreds of "graded" charts, from very simple to unplayable. They also provided educators (who might be just learning jazz) with a nice "sampler" of excerpts from a few of their charts, and a sample abbreviated recording of each.
The Hal Leonard Publishing Corporation of Winona, Minnesota, USA has "absorbed" many of the smaller independent jazz and fusion publishers. They might be the most fruitful single-source of this stuff.
Berklee Press - Boston - is still very active, although most of their charts used to be quite advanced.
I have no idea how many of these once-wonderful publishers are still providing printed music - a sad commentary on our times, and on our values - but here goes:
Robbins Music Corporation - New York
Bourne Company - New York
Banes Music Company
Studio P.R. - California
Editora Musical Arapua, Sao Paulo, Brazil - Latin specialists
Maynard Ferguson Music, Ltd. - London (I believe)
United Artists Music Company, Inc. -
Silhouette Music Copr. - New York
Leo Feist, Incorporated - New York
Tempo Music, Inc. - New York
Frank Music Copr. - New York
(Herbie) Hancock Music Co. - New York
At one time, each and every one of these was publishing charts for 17-piece (plus) big bands. These should get you started on the right track.
In music, everything one does correctly helps everything else.