Whoops. Brace for a new outbreak of Nixon Fever. Local philographer Frederick Casoni has toiled for ten years on "Best Wishes, Richard Nixon: The Handwriting of Richard Nixon." It's to be dished in June by the Universal Autograph Collectors Club. Casoni can spot in a second which Nixon autographs were scrivened by an "Autopen." (It's sort of a secret. But the Autopen is the signing gadget used by pols, and by presidents since JFK. LBJ even used it to sign the US Senate's official record of his Oath of Office as Veep; and dear old Ike used it between jobs, at Columbia University.) Casoni can also spot "signatures" scribbled by secretaries, and pinpoint the period of a Nixon autograph. Among letters Casoni's assembled: One to Ike in '52.( "As a Californian," Nixon writes, "I am ashamed of the fact that we seem to attract so many crackpots to our State . . . ") Nixon's January '72 letter confirming his candidacy was signed by the machine, Casoni nods. But his letter of resignation was signed by hand. Hand-signed "Dick" is a "Dear Jack" letter to JFK, promising to read Jack's book "Profiles in Courage" in January of '56. Nixon also hand-signed JFK's Senatorial Oath of Office. (He was president of the Senate in '59, recall.) Fans who forked over for the autographed copies of the Nixon memoirs will be relieved to hear Casoni's shout that they're hand-signed. Casoni tells Ear he shipped bits of his monograph to the former prez for comment. No comment, darlings. But he did get it back. Attached: A Nixon calling card--signed, personally, by hand . . . Meanwhile, in faraway California, 750 rip-roaring Republicans rolled into a grand $150,000 fund-raiser in the Disneyland Hotel in Anaheim. It was to hear Richard Nixon speak. The former Prez wasn't paid a dime. He forked over $1,500 for a table of Young Repubs from Whittier College. He Spoke for 45 minutes. Then, darlings, he whisked out his trusty pen, and signed folks' programs for half an hour, in the frumpy old-fashioned way. Ear is pensive.