I had my antenna hole filled in and went with a Retrosound HPA-1 hidden antenna (to go with the rest of my Retrosound Model 2 stereo system).
http://www.crutchfield.com/p_068HPA1/RetroSound-HPA-1-antenna.html
It works like a champ! Probably as good or maybe a little better than the factory stereo in my 2012 Ram. I don't have a center channel speaker for the middle of the dashboard, so I zip-tied it to the underside of the factory speaker grille piece under the dash pad.
The reviews are hit and miss, but mostly good as far as I can see - most people complained about crappy AM station reception. For $25, I say it's a deal and who really cares about AM stations, anyway?
You'll need a keyed power source for the signal amp - I just tapped the radio's main power circuit so it'll work when the radio works.
I love the cleaner lines of not having the antenna sticking up out of the car, as well as not having to worry about whether or not I'll get to hear the classic rock radio station in town. I'm not sure how the range compares with a standard antenna, but when I'm cruising out of town, I usually have something playing MP3s through the USB flash drive or iPod inputs anyway.
And No, I don't have any pics of it installed - it's hidden... that's the whole point. :whistling:
Hope this helps.