Are you familiar with Ravelry.com? If you're not, it might be worth checking out the site ... it has a "stash" feature where you can list the yarns you currently have and whether or not you'd be willing to sell or trade.
When I did a search, I saw that there is a Ravelry member who has this yarn in their stash and has it listed as being available for sale or trade. Click hereto see.
You might try contacting them to see if it is still available and what they would be willing to sell or trade for it.