Amazon.com has a Terk SIR-EXT50 Indoor/Outdoor Extension Kit (Sirius) for $19.94 with Free Shipping on orders over $25.
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- Only works with single-input Sirius tuners n
- 50-foot cable n
- Detachable cable for easy routing n
- Works great indoor and outdoor n
- Perfect for the home, bus, truck, RV, or boat