Sorry I can't help David but I can see your point about the similarity to the Hlava vases.
I think the ebay vase towards the bottom where it goes clear resembles the base of the Hlava vase like this one I attach a photo of.
I agree these vases seem difficult to place and may have to be an enduring mystery. They certainly look European though, I do not know if a GMB member like Ivo with his wide knowledge and exp. may agree with that or if the pictures don't allow him to form a judgement (or not). Please chip in Ivo if you have a view!
They look good quality vintage blown and nicely finished I can understand your frustration David! It is good to have an attribution. I would definitely guess European, other GMB members have commented on Australia like Canada as having imported a lot of European glass.
yours,
bOBA