Spigen just put this up on ebay today:
Looks to be released in December though. I was really hoping to find something like this, I don't want to lose the textured power button.
Edit: Also this one but I don't know the brand: http://www.amazon.com/REDShield%C2%AE-Flexible-Anti-shock-Silicone-Protective/dp/B015GBA6HE/ref=sr_1_10?ie=UTF8&qid=1446238392&sr=8-10&keywords=nexus+6p+case+ringke