Guys I do not know where to start.
While looking for plans for the Boxer I came across Joan, Rick Allison's wife. Talking with Joan (a pattern flyer herself) was pretty neat. Not knowing Rick had past away a while back, I gave my condolencemail.
Joan was happy people were still interested in the plane. Joan has given permission to distribute the files free to everyone one.
There are four sizes 45, 60, 90, 120. The drawings are of the latest reversion.
I've asked a friend to help me covert the CAD files to PDF. From what I understand the plans are detailed with a built up or foam wing.
https://drive.google.com/drive/folders/0B5Jo2V32-osPN1E5YzVXeDdVTXM?usp=sharing