I know I have photos of Lyle and Palma (Johnson) Nichols. I don't know about Herbert Lee Nichols who was the Son of Nephi and Elma. I will check with my Mom.
Have you done any digging with the Mormons on Nephi's background? With a name like Nephi Moroni, James and Polly HAD to have been Mormons. And I think they may have been a part of the colony at Beaver Island off Michigan with the Strangites. There was a Reuben T. Nichols there as well but I haven't been able to find a connection.