The photo's of dress shown with flowers belongs to Met museum and is similar. The flowers shown are from LeMarie of Paris.
The National Gallery of Victoria Melbourne has a similar Mugler in their collection in the Department of International fashion and textiles. If you would like to add flowers. Call M&S Schmalbergin in NY USA. Exquisite work and can make what you need. They also have a great selection of ready made silk large flowers that would do the job.
A beautiful original from Thierry Mugler Its a rare dress was crazy expensive in 1988 one owner. The item "Thierry Mugler Rare Fall 1987-1988 Black Velvet and Pink Satin Mermaid gown" is in sale since Wednesday, June 12, 2019.
This item is in the category "Clothing, Shoes & Accessories\Specialty\Vintage\Women's Vintage Clothing\Dresses". The seller is "fgp1511" and is located in Lake Worth, Florida. This item can be shipped to United States.