I'm trying to track down the book or instructions to this model:



It is made from a single sheet of paper, lots of precreasing and then pushed into place to form the shape. I lost the book, and these are my last two models. Tried reverse engineering by unfolding and re-folding, but to no success. I think it's a fairly obscure book from the 80s.
Hoping anyone here has seen this or done this and point me in the right direction. Thanks!!
Ed