Sports and entertainment executive Casey Wasserman is reportedly putting his talent and marketing firm up for sale after newly surfaced emails revealed flirtatious exchanges with Jeffrey Epstein associate Ghislaine Maxwell — leading numerous big-time clients to flee. Wasserman told staffers at his eponymous agency on Friday night that he had “become a distraction” to the firm’s work, the Wall Street Journal reported. In 2003, Wasserman and Maxwell, who is serving a 20-year federal prison