Technically yes, I do have diagrams for my guinea pig, however I do not have diagrams for this variation of the design.
Even so, the diagrams are not freely available, however they are published in the 2009 origami collection [link]*U00Xr7&next=10&product=Origami_USA_Publications (couldn't find a link directly to it )
BUT I should warn you, it is NOT a simple model. It is deceivingly complex and requires a few difficult maneuvers. So if you aren't an experienced folder it may not be the best model to start learning origami with.