OP here. I just searched "Vuelta Corsa Lite freehub" and didn't think about 10 vs. 11 speed. At any rate, the freehub itself was 55 dollars. After a refund from Nashbar for the Vueltas, I wound up having to pay about 60 dollars for the Ultegras, which according to reviews, are excellent wheels. I was ready to go in a different direction after having two separate issues with the Vueltas.