That would be fun to talk to them but most have them have passed away by now+
You may wish to contact the Negro League Baseball Players Association at http://www.nlbpa.com. They have a "Contact Us" link which should help you get started with contacting the remaining players from that era.
ANSWER
I wouldn't get too discouraged - the Negro Leagues lasted until the early 60s, so plenty of former Negro Leaguers are only in their 60s and 70s
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The Negro Leagues
Hank Aaron was 18 years old when he played for the Indianapolis Clowns in 1952.
The first organized league of teams consisting solely of African-Americans -- it was called the Negro National League -- was in 1920. This first league lasted until 1931. A second league, also called the Negro National League, was organized in 1933. Another league, the Negro American League, was launched in 1937. The former folded after the 1949 season, the latter held on until 1962.
The Negro League
He organized the Negro National League a Negro League Baseball Division that consisted of many Great NLB teams.