According to the origami database it's diagrammed in OUSA Convention Book 1988 and in Papercopia : Origami Designs by Shall, David. Please search in the Origami Database before opening a new topic.
Hi..
I have already searched on the database for it and I already found exactly what you found and but I don't want to buy a whole book for one diagram, if any of you tried to fold this model and have the diagram and can share it with us it will be great. Or if you have a website where I can buy this diagram only and not the whole book because it does not make sense.
Sorry, but it's illegal to share diagrams that aren't free on the internet. The OUSA Convention Book '88 has a lot of other cool models, so you don't buy it just for one model.
Jeremy Shafer has some tutorials for similar models on Youtube or you could try designing one.