This ought to do it.
Hodges has the best price I have seen, and is an authorized Garmin dealer. I believe this also includes free map updates for a year from Garmin. It's a G3 HD card, not the more advanced G3 Vision so it doesn't include high-res depth shading, 3-D views, high-res relief imagery or ariel photos. It includes everything else though, even auto-routing.