Powermatic made industrial tools in the USA until 1999. Including table saws, band saws, lathes. Powermatic was bought out by a Japanese company.
Bell Plastics makes replacement parts for your Powermatic table saws. So if you need a new door or motor cover, you can still buy American. In addition Bell Plastics also manufactures different size dust port. The port will allow you to attach a vacuum hose to your saw.
In conclusion, if you want to add a dust collector to you saw. Bell Plastics can help.