I have loved them all too. And I know some of the DWTS dresses ended up for sale, so maybe these will too. Although they flat out tell you with the DWTS dresses that they are held together with nothing but a hope and a prayer because they are made for only having to last thru one dance...so not sure they would work for a person in real life unless you DID just wear it once, or reinforce it or something.
The more I think about it I'm not sure if they meant how the costumes were made or how they fit them to the dancers. Maybe the costumes are regular dresses but the "rigging" has to do with fitting it to the individual dancer and thats where the tape and pins and other haphazard ways of holding something together come in. Would love to hear from someone who may know more about this....