Fiberglass one could have been made by any one of a number of producers. Many fiberglass canoes will be made by one manufacturer and rebranded for big box stores. Looks like a chopper to me, which means it is sprayed in fiberglass as opposed to sheets. Choppers are on the bottom end of quality.
I wouldn't worry much about who made it, but rather take pride in the fact that you resurrected a butt ugly canoe and turned it into a thing of beauty.