That sounds like a better option than what I have, but if you don’t get all that this is the FM mod I use and it works clear across the shop through walls it’s so good:
http://www.griffintechnology.com/products/itripauto/
I got mine as part of a kit with a wall charger, carrying case, headphones, and a headphone splitter for 79 bucks. It says Griffin Utility Kit on the box.