The good "part out" days were about 8-10 years ago... now everything is rare.
Looks like it's about $140 here. https://www.infinitipartsonline.com/oem ... 1657864u00
I'd call or email them (or another online parts vendor) with your VIN and have them see if it's actually available. The part will definitely vary by if you have a TCS vs. NON TCS car, and probably by year.
is a good resource for finding junk yard cars. I searched for air hoses and didn't see anything available, but I found a few "air flow meters" so maybe if the car is actually there, rather than a part on a shelf that they pulled some time ago, they'd have the hose too?