Photo printing for exhibition

How do you get photos printed on canvas for art shows? If accepted by the jury panel, my photo would be displayed in a museum for several months. This is my first time submitting to such a show. I need to have the canvas print put on stretcher bars by a frame shop. Online printing options seem cheaper than local print shops but is the quality good? When getting it printed, the stretcher bars take 2 inches all around the perimeter so how do you make allowance for that in the print? I would appreciate any advice. I’m obviously a beginner at this.