I'm in search of the manufacturer's name of an offset umbrella bought at Target in 2009. Oringinal sale was about 390.00 I looked all over the unit and have found noe name or stamp. It is 11 or 12 ft in diameter and has a plastic square base that can be filled with sand. It has a smooth curved arc that extends out for coverage. It has a pivot point and locks in at various points during the rotation of the unit. Problem is the shaft is made of a cheap pot metal and has sheared off. I'm trying to locate a new shaft of someone who may make a shaft for it. Help?