Need help locating part ##

[SlightlyTweaked]

Need some help finding a part. While rolling around under truck with creeper i reached up to pull myself along and mistakenly snapped off the vent tube fitting on the front axle assembly. 2014 2500 4x4. I am not 100% sure if the fitting just threads into the top of axle housing or if there is some type of lock ring on inside of pumpkin. Hopefully it just threads in. Anyway, i have been looking around and cant find one online anywhere. Anybody know where i can get one? Its probably a $5 part causing me $1000 worth of aggravation. It should be #2 on the axle assembly picture

 

[NHguy]

I would guess that's a dealer item.
Its a non-wearing item so aftermarket usually won't sell it.