This might be a bit of a long shot, but if all else fails, you could try to scale-up from an accurate model kit and draw them. The largest scale with the correct 5 blade prop is the Pacific Coast Models 1/32nd scale MkXIV, or the Revell 1/32nd scale Mk22/24. Alternatively, in 1/48th scale, there are the Airfix Mk22, and the Sea Fires.
Not the best way of going about it, I know, but lacking the proper drawings, it might be a start, and for a '3D model', where there won't actually be a physical blade to closely inspect, and a darned sight more accurate (for the 3D model) than substituting a Fw 190 or '109 prop, both of which have different profiles to the Spit MkXIV.