I don't know that there are any "blueprints" per se, of WC3 ships. The package inserts for WC3 (if you bought a boxed version) have an insert which gives you top/bottom/side/orthographic views of each of the ships, but these are not "blueprints" in the usual sense of the term.
Yeah that's exactly what I mean...I had those but I lost track of them. If somebody could scan them for me it would be great . I'm working on high detail version of the arrow (3d)...and I need to check a couple details.