Facilitator Capital Fund, a Madison private-equity firm, has acquired Production Stamping Corp., a Milwaukee metal stamping firm. Terms of the transaction weren't disclosed. Production Stamping has annual sales of $9 million, and 56 full-time and 20 temporary employees. The company makes metal parts for manufacturers like Tower Automotive Inc. It operates out of the Riverworks Industrial Center on Milwaukee's north side. Facilitator Capital is a $120 million private-equity firm that focuses on buying small to medium-sized established businesses in the Midwest.