I used a halloween costume pattern and then kind of winged it for the wimple part. I guess it really should be like a hood, but I just took a rectangle of fabric and pleated it and then sewed it to one side of the veil hat bit and pinned the other side.
It'll either be ok, or it'll look like a white beard. Who knows!? I'm going to take a little sewing kit in case I need to make changes and I might be cool and sew some velcro to the side instead of making someone have to try to not stab her head with a safety pin every time she puts it on! She wanted a cape too, but that might have to come for Christmas! Oh yeah, the veil is being modeled by a big jar of cat food - it was kind of all I had that was remotely head shaped!