With a trip to the Little League World Series at stake, Morristown fell to South Shore, Staten Island, 5-0, in the Metro Region Final on Friday at soggy Bart Giamatti Field in Bristol, Conn. Morristown couldn’t break through against left-hander Stephen Grippa, whom they had battered in a lopsided win over Staten Island earlier in the week. Grippa pitched five scoreless innings while giving up two hits and was removed when he reached his pitch-count limit. He escaped a fifth-inning jam that was Morristown’s best chance to score. With Morristown trailing 2-0 and a runner on first, catcher Charli…