Where can my SIL find Plus Size BM Dress Samples

One of my SIL's BM's is complaining about the dress, and wants to try it on before buying it, but will not fit into the sample size. The dress my SIL wants is by Alfred Angelo, anyone know where we can find it in a Plus Size??

And I thought I was being a PITA about the dress, I don't like it and can't try it on either, but will wear it and won't tell her I don't like it, since I have not seen it in person just on the internet.