There's a VG one that I've been trying to get my hands on... so far no luck because my group buy vendor is being sketchy and not responding to messages after a month from purchase.
For the time being I simply removed the stock antenna stick and just let it sit there without it on, radio signals & XM seem fine. I'm interested too to see what other antenna options there are; I obviously removed mine cause it looks cheaper than anything that you would find at thrift shops.
