Hi Erik
As far as I can establish, no BoS has a top view line drawing of the two speeder that you are looking for, including the 1926 book. However, in the 1928 BoS, there is a full page side view line drawing of the biscuit barrel two speeder. If you decide that this will serve your purpose, I will scan it and email it to you.
Dave Bushell
SOC Librarian.
