By DAVID MARTINMiddle-aged white guys who cover sports in Kansas City are getting harder to find.Earlier this year, Fox 4 sportscaster Frank Boal stepped away from Crunch Time, the 810-WHB radio show he hosted with Dave Stewart (pictured). Jeffrey Flanagan's Page 2 column appeared in The Kansas City Star for the last time on November 8, a casualty of McClatchy Co. downsizing. Last week, Crunch Time disappeared altogether. And today comes word that Jack Harry's 38 Sports Spot will no longer run o