Long story short, when I bought my wedding dress I was wearing two hooped skirts/tulle petticoats to get the volume I wanted, and my alterations lady told me she could build up the tulle underneath to get that look, but I still don't think it's big enough - I want a full on ballgown shape.
I've called a few bridal stores and most only hire hoop petticoats out to brides who bought their dresses at that store, and are having their alterations done there (this is because it needs to coincide with the fitting where the dress is pinned for length). So, although I could get one it would cost the same as just buying one online, be hard to arrange, and require me to take it back the next day which would be a PITA.
While I wait for my alterations lady to tell me if she can source one for me or if I need to arrange one for myself, I've been browsing online and it seems like most sites are pretty dodgy-seeming so I'm wondering if anyone has any good sources?
For reference, I really do mean BIG - Elizabeth Taylor, full on princess large, haha: