Electric-car purveyor ZAP (Zero Air Pollution) plans to sell smart fortwo minicars here by year’s end. The cars have fuel-efficient three-cylinder gas engines and will not be converted, like other ZAP products, to all-electric. About 100 fortwos are holed up in Santa Ana, California, wearing the local, capitalization-challenged label "smart, Americanized by ZAP” and will sell for $15,000 to $25,000 per copy, depending on trim and equipment, says ZAP director and CEO Steve Schneider. The company plans to sell 15,000 per year, at least through 2005. But there are barriers. At press time, the for-twos had met NHTSA crash certification, but were awaiting stringent EPA emissions certification. And DaimlerChrysler, which is launching the smart brand here in 2005, hasn’t sold any cars to U.S. gray-market importer Smart LLC, ZAP’s supplier—the…