For years, Scott Smith had tried to find the woman who appeared on the cover of Sports Illustrated on Oct. 17, 1960. Model Dolores Greer died last month. The search for a Los Angeles woman who 53 years ago was a Sports Illustrated cover girl has ended sadly for a collector of autographs from cover subjects. Model Dolores Greer, 81, died last month on the same day that cover autograph collector Scott Smith was being interviewed by The Times. Greer's obituary appeared in Sunday's Times. The saga of Smith's search for the model who illustrated the magazine's Oct. 17, 1960, cover story on the "new look in sports clothes" has spanned more than three decades. The retired New Jersey investment banker and corporate debt specialist has collected the signatures of 4,413 individuals who have been featured on 2,913 of the sports magazine's covers. He figures he has the autographs of 95% of all cover subjects. Tuesday's s