Before licensed products get manufactured, designers have samples of their ideas made that either get approved for mass production or rejected by the powers that be; this garment is an example of a prototype from the year 2000.  

Since most prototypes are destroyed, and only 3-6 copies of each are made in the first place, the two examples we have of this one (which we acquired from one of the original designers, who kept some of the prototypes for her personal collection) are probably the only ones that exist.