A Danish firm's expansion is giving Wisconsin another player in the manufacturing sector geared toward alternative energy.Avanti Wind has been in operation here for several years, making service lifts used by technicians who inspect and repair wind turbines and need to scale the turbines' tall towers.Now the company has moved to expand here by moving production of aluminum ladders to Wisconsin from China and Germany, said Kent Pedersen, the company's U.S. general manager.The pace of wind development across the country has slowed considerably this year - with the second quarter installations of wind power down 71% amid the slow economy and developers having a hard time getting financing."But we have done quite well in expanding our customer base in North America, and we've continued to grow...