Twin spear problem

For some stupid reason a while ago, I sold the twin spears that marrek gives you to complete the mission for the twin spear skill book. Anyway you guys think I could fix this so I could try out spears?

You can't buy them from the market place? On the other hand, if I remember correctly from my sword lann, you don't actually use the twin spears to learn the skill, you use the thrown spears to kill certain enemies.

You have to kill the wisps using the secondary spears. And you can buy the Twin Spears from the market.