Yeah, they did discontinue the OEM ones, but there are a few kicking around in someone's inventory I'm sure.
I always prefer OEM mats, but if you're telling me that the Weathertech ones are a better fit, I would consider them. Still the Infiniti branding is always nice. I read somewhere that the weathertech ones get caught with the pedal but maybe that was just a one-off.
Here is where I found the best deal, in case it helps any of you - $177.90 for fronts and rears plus free shipping. Autoanything.com