Paul - That boat could be a Northern Fiberglass Industries.(1981-87) My original 10' boat was my Grandpa's and was from before NFI possibly made by a St. Paul, MN character who made molds and boats. I have never seen one with eyebolts on the ends. Does it still have foam in the points, or can you see evidence they once were foamed?
NFI sold their boat molds and dealer relationships to Carstens. I know some of the molds for that model were thrown away. You could call over to Express Composites in Minneapolis and ask for Jim. NFI was his company. He has the stories and memory of some of these original boats and where they likely came from.
They did come with oar locks and spud holes but I've seen old ones like that both ways in the region. There was another company called Explore Fiberglass, or Explorer. They used to use a sticker inside their boats which would peel off and get lost. That was in the 70's I believe and they were in St. Paul, MN. Many boats were made off molds by individuals too without any affiliation for their own use so specific lineage is difficult to uncover in my opinion. NFI called that boat model a "Widgeon". There was an old Carstens brochure on this site that shows that boat from the 80's as one of theirs before the current Puddler design. There's still some nice old ones out there in your area, but a lot of them sat out on the woodpile or leaned against the garage for 20-30 years.