Search Online Music Stores: Look for reputable online music stores that sell digital sheet music or music in various formats. Websites like Musicnotes, Sheet Music Plus, and JW Pepper offer a wide range of music arrangements and may have the specific Basie arrangement you're looking for.
Purchase Original Recordings: If you're interested in the Count Basie Band's original recording, consider purchasing the album that features "Billie's Bounce." Look for the album titled "The Count Basie Story"(1958), where this Basie arrangement is likely included.
Visit Music Libraries: Some public and university libraries have extensive music collections and may have copies of sheet music or recordings featuring the Basie arrangement. Check with your local library to see if they have the resources you need.
Contact the Basie Estate or Publisher: If you're unable to find the specific arrangement you're looking for, you might want to contact the estate of Count Basie or the publisher of the music. They may have information on how to obtain a copy or may be able to provide further assistance.
Contact Jazz Enthusiasts or Musicians: If you have friends, relatives, or acquaintances who are jazz enthusiasts, musicians, or have knowledge of jazz history, they might be able to provide information or suggestions on where to find the Basie arrangement.