Most US public libraries can order musical materials for you on an InterLibrary Loan program if they don't own it themselves. This can be a starting place. Some of these sites carry sheet music by the composers. Look closely at those for sheet music. Very often, general books of Jewish music are easily adapted for easy playing.
Many Jewish musicians arrange their own music.
Some in your area may privately publish arrangements for children. An anthology of music selections arranged by instrument and graded for students. Contains an appendix with contents listing song titles of currently available Jewish music collections. Goldberg, Ira S. Bibliography of instrumental music of Jewish interest. A listing arranged by composer within groupings of instrumental forces.