Bread-Bakers v098.n018.4

Hi Bakers....years ago, Thomas' English Muffin company made a very moist
dark and dense bread called Thomas' Protein Bread.  Texture was similar
to their english muffins.....sliced thin...and absolutely wonderful for
toast.  Does anyone remember that particular bread??  and if so, is
there a recipe that approximates it??  I would surely appreciate any and
all answers.....
                    Bobbi