Prettier than a tk knob and just as expensive/pointless, so there's that too. There's even a Chinese version if you want to save some $.
Dry Carbon Fiber Key Fob Holder Fit For Nissan GTR Infiniti Key Covers Case Red | eBay
I should've been more specific though, mine is leather but with a stitched carbon fiber looking overlay, similar to those depicted in the first links, but shaped the same as the fob itself. I'll see if I can find it again on ebay.