Yup! I used this one.
You can avoid the usb hub by just upgrading the battery. See here: https://www.reddit.com/r/stratux/comments/3jqu7y/review_anker_astro_e5_battery_pack/ You can use these because the pi is too small to plug two tuners in: http://www.amazon.com/gp/product/B002KNI796
http://www.amazon.com/Mediabridge-USB-2-0-Extension-Gold-Plated/dp/B002KNI796/
Not exactly what you asked for but the wire is only 6 inches, so maybe that would work?