Thanks for the offer Ben, but since I couldn't find the info I decided to go with a little Pitts instead.
You can see its progress here: http://www.rcuniverse.com/forum/m_3382269/tm.htm

I wouldn't mind building a Hog Bipe in the future in a different size, so if you could take a picture of the plan, that would be great. I don't need an actual copy of the plan, just a picture so that I can see how the span, length, stagger and chord relate to each other.