Untested proof-of-concept. This is in Public Domain.
This is version 2. The space between the pin rows is equal to 6 pin rows. If your breadboard has a center space equal to two columns, this occupies three columns on each side, leaving just two columns free for pins. This is completely one sided design, with no vias, all traces on the top side.
Note that the odd pin numbering is not an error. Pin pairs 12-13, 21-22, 34-35, and 43-44 are deliberately swapped; this is what allows a single-sided board.