Lunn was a family owned company that was a contract manufacturer for fiberglass components for many different customers including the US Navy - torpedo tubes and periscope housing parts. They also built the tooling and were the first builder of the Allied boat Seawind.
According to Roy Berg, former chief engineer at Lunn (and first owner of the Black Dolphin) , they received a contract from O'Day to build 25 Dolphins in 1960. The tooling reportedly came from O'Day and was possibly modified in some ways. For example, the original O'Day/Marscott tooling produced a hull in 2 full length pieces which were then bonded together. Lunn reportedly modified the tooling to make the hull in one piece although this has not been confirmed. Lunn-built Dolphins also had a reputation for being lighter. Lunn was a very important builder in these early days of the Dolphin and your field investigators are working hard to better understand their role, especially in how they may have changed the glass layup to achieve a lighter boat, or perhaps a weight redistribution.
There is an interesting story about the start up of Lunn's production told by Ralph Heinzerling, owner of Jack Rabbit. Click here to go to it