Bosco Nedelkovic of Arlington is searching for a millionaire to help him build his fantasy island EMSUS--Experimen tal Module of a Sustainable Society--which he defines as "a theme community built as a tourist attraction around the idea of a new social order: Utopia as Entertainment."

But unlike Disney World's EPCOT (Experimental Prototype Community of Tomorrow), which Nedelkovic finds is "overdosed with the hardware of technological razzmatazz," his EMSUS would "concentrate on the software of social organization." Its visitors would sign up "for short stints of duty as if they were entering a space colony."

EMSUS is the successor to Nedelkovic's previous idea, Pot Luck Acres, which was the natural heir to his Happy Doomsday Retreat, which was sired by his Basic Livelihood Inc.

None of these has come about, but that has never seemed to discourage Nedelkovic, an interpreter with the Inter-American Defense College at Fort McNair. Born in Belgrade, Yugoslavia, brought up in Italy and Paraguay, and a U.S. citizen since 1971, he is equally voluble in Serbo- Croatian, Italian, Spanish, Portuguese and English.

At 50, he can laugh at the absurdity of his proposals. Nedelkovic is your friendly neighborhood visionary --a poor man's Buckminster Fuller. His many requests for foundation funding have always been denied because, he acknowledges, his ideas often lack detail.

Originally, Nedelkovic wrote long, passionate letters to heads of government, universities, foundations. "I was searching for a philosopher- king," he says. He corresponded with several prime ministers in the Caribbean. On one occasion, he says, he almost had his project approved by a awaiian governor. But he says political activists intervened. "They were opposed to mainland imported wisdom," Nedelkovic says. "They wanted no interface with modernity. They were tantalized by concepts associated with neotribal revival."

Having neither a high school nor a college degree, Nedelkovic says he lives "a life of continuous education." The practical outlines of his visionary community may be vague, but Nedelkovic has no shortage of words to describe it. For instance, EMSUS would offer "adequate standard of sustenance for all on a collective basis, and then still leave ample room for private enterprise and individual achievement beyond that."

His utopia is "a political recombinant, which splices genetic materials from socialist models," and which could work anywhere, he says. He opposes the western market economy because of its "proprietary plunder" and he condemns "the futile attempt to control everything" in Marxist societies.

Nedelkovic acknowledges that his utopia will never happen. Yet he goes on mailing out more proposals. His most recent targets are Hollywood movie moguls. But . . .

"There is no time," lectures the ever-so-cheerful Nedelkovic, "no time left to implement a sustenance subsystem before we start disintegrating."