CORTINA D'AMPEZZO, Feb 20 : The thrill Alpine skiers delivered during the Milano Cortina Olympics may soon become more difficult to achieve for aspiring youngsters as new generations of athletes struggle with the soaring costs of a sport that is becoming increasingly elite. For most skiers competing in the International Ski and Snowboard Federation World Cup and Europa Cup - the second-tier circuit mostly dedicated to younger athletes - sponsors cover most expenses such as skis, suits and