I started a similar post a couple months back. I had a very hard time finding the part locally. It's available in the SBS catalog, but most of my local retailers were reluctant to order from them and/or would charge extra to meet their minimum.
On a fluke, I called a random bike shop here that ended up having it. It was actually branded a Suntour part (Suntour XC60 / 133116), but appears identical to the Tektro part. $12.
It was in the parts bin of their shop, so I doubt they have more. But if you still have trouble finding it, I can see if they have another. A little cheaper than Harris, but not much, since I'd still have to ship it to you.
BTW, Harris only has them in silver, but Sheldon said, "paint it."