I was looking just this morning at my one and only example of the tubular yellow elbows you show. The trailings are fully flush with the base glass, so it is different than the white pineapples in that regard, not raised slightly above the base glass. To me, the yellows seem newer production, but I would like to learn more too since I don't know.

I know some reproduction 'pineapples' have been made by T&T, pink and black, probably from India.
http://tttbeads.com/categories/8/index.html