WANTED: Purple metallic sequin Alexis gown

This gown is another that is 80's style to the max with multi-colored metallic fabric in hues of purple, black, silver, and green, covered in sequins, with large puff shoulders.  The pattern of the fabric has a marbled look.  This design was originally cut above the knee with a high center slit, which is how it was worn by Joan Collins when it appeared on "Dynasty".  At some point this outfit was later turned into a full length gown.  I think the full length version has a more dramatic, elegant, and formal appeal, where as the shorter version loses points for lacking all of these qualities and, dare I say, looking a bit cheap!  Not something I would expect a wealthy, sophisticated, middle-aged woman like Alexis to wear-- no matter how great she looks in it!

WANTED: If anyone has this gown, or any information on its whereabouts, please let me know!