Are you a member of Ravelry.com? It's free to sign up if you're not already. There are several members who have KnitPicks Shine Worsted in "Terra Cotta" in their stashes (
click here to see the members who have this yarn stashed) ... you could see if someone would be willing to sell you a few skeins to finish your project. It looks like no one has this particular color listed as being for sale/trade, but members are often willing to help when it comes to discontinued yarn (especially if they don't have a project in mind for the yarn you're looking for), so it wouldn't hurt to try before you end up frogging!
