hey Shawna, love the vintage dresses & not meaning to be a pushy jerk, but...
a modern size XXL is more in the 37" - 40" waist range (a 32" waist = size 14 = a modern Large or, maybe, XL). Thus, a 32" waist dress is totally "plus size", but maybe not so much "XXL", you know?
Just sucks to search for truly "XXL" vintage and keep finding prettypretty frocks that will never fit. Sigh.